The Kroger Co. and Duro Paper Bag Mfg. Co. appeal the National Labor Relations Board’s (NLRB) dismissal of charges that the United Paper Workers International Union, Local 832, had engaged in an unfair labor practice by picketing to promote a secondary boycott against Kroger in violation of § 8(b)(4)(ii)(B) of the National Labor Relations Act, 29 U.S.C. 151, et seq. (NLRA).
Kroger is engaged in the retail grocery business, and in May 1977 operated grocery stores in Ludlow and Covington Kentucky. Duro, a manufacturer of paper bags, was the exclusive supplier of paper bags used by Kroger customers for carrying groceries. Although Kroger routinely furnishes boxes instead of bags to the few customers who request them, Duro bags were the almost universal means used by Kroger to convey groceries to its customers.
Local 832 is the exclusive bargaining representative for Duro’s production employees, who were engaged in a lawful economic strike against Duro during the first half of 1977. Although Local 832 had no labor dispute with Kroger, it established pickets at the Covington store on May 19 and May 29,1977, and at the Ludlow store on May 20 and May 23, 1977. Throughout normal operating hours the pickets carried signs reading:
CONSUMER BOYCOTT
OF
DURO PAPER BAG MANUFACTURING CO. PRODUCTS
B.Y.O.B.
(BRING YOUR OWN BAG)
DURO PAPER BAG MFG. CO.
UNFAIR
LOCAL 832, UNITED PAPERWORKERS INT’L UNION, AFL-CIO .
The picketers also distributed handbills which, in addition to asking shoppers not to use Duro bags, urged them to ask Kroger for boxes rather than bags, or to supply their own means of carrying the groceries home. The handbills explicitly stated that the Union’s only dispute was with Duro, and not with any other employer. The distribution of the handbills is. not challenged.
2800 customers shopped at the Covington store during the two days of picketing, of whom 85 requested boxes. Kroger was able to satisfy 70 of the requests before its supply of boxes was exhausted. 1500 customers shopped at the Ludlow store, of whom 65 requested boxes, with Kroger able to satisfy only 30 of the requests. Thus, Kroger was able to provide enough boxes for only 2V2% of its customers to comply with the Union’s appeal. A few customers utilized their own containers, such as pillow cases, bags, or boxes, to transport their groceries yet comply with the pickets’ request. However, at the Ludlow store, on May 20, one customer refused to accept her purchase in “scab bags,” and left the store without paying for or taking the groceries.
*636On May 23,1977, Duro charged Local 832 with engaging in unfair labor practices. On August 19, 1977, the General Counsel of the NLRB filed a complaint against Local 832 pursuant to Section 10(b) of the NLRA. The parties waived a formal hearing before the Administrative Law Judge, so that the record for the Board’s decision consisted solely of the stipulated facts and exhibits. On July 14, 1978, the NLRB found that the picketing did not impermissibly urge a secondary boycott of Kroger, and dismissed the complaint. 236 N.L.R.B. 1525 (1978). The NLRB based its decision on a finding that shoppers could patronize Kroger’s stores without using paper bags to carry their groceries. 236 N.L.R.B. 1527. The Board relied on the future availability of boxes as an alternative and on the fact that a few customers did supply their own containers during the boycott, to conclude that paper bags were not necessary to sell groceries, and thus did not lose their identity by merging into the overall operation of the store. Id. The Board also concluded that because Kroger could (and in fact, did) sell groceries without bags, the Union’s appeal to consumers not to use bags was not an appeal to cease patronizing Kroger entirely, when as here the pickets made it clear that Kroger was not the object of the boycott. Therefore, it found no violation of § 8(b)(4)(ii)(B).
Finding that the record as a whole lacks substantial evidence to support the Board’s decision, we set aside its dismissal of the complaint.
The record in this case was limited to the facts and exhibits stipulated by the parties. The stipulation states that during the picketing Kroger could supply only 21/2% of its customers with boxes as an alternative to the Duro bags. The Board dismissed this fact with the assertion that it only demonstrated the “present unavailability” of the boxes, and the claim that “logic dictates that there were means other than using paper bags available.” 236 N.L.R.B. 1527. However, the record is devoid of evidence that the future availability of boxes would be sufficient to supply all customers with boxes instead of bags. The only boxes available to a supermarket are those in which goods are received. Logic dictates .that a greater number of boxes would be required to transport customers’ groceries than were required to bring the groceries to the store. When received, items of a common size and shape are efficiently packed. The customer’s purchases are of all sizes and shapes and cannot be packed in the same space. The. customer is unlikely to tailor his purchases to fit the capacity of the boxes at hand. Some boxes are too large or too small to be of any use to customers carrying groceries. At least some are certain to be unfit for reuse after their receipt by the store. Moreover, many large volume products such as bread and milk are not delivered in boxes. Thus, used boxes could not be relied upon to carry out of a supermarket all of the produce that comes in. In addition, where Kroger could store a thousand empty boxes remains unanswered.
We are also unable to find evidence in the record that any other meaningful alternatives to paper bags exist.1 The record does disclose that several customers brought their own means of carrying groceries with them. 236 N.L.R.B. 1526. However, the record also discloses that at least one customer did not do so, and then refused to purchase her groceries in “scab bags.” Id. Those 50 customers who asked for boxes but could not get them did not have an alternative available, and simply accepted their groceries in Duro bags rather than comply with the boycott. .
*637The vast majority of customers would receive their first notice of the pickets’ demands upon arriving at the store. To comply with the boycott, they would either have to find an alternative to bags, or shop at another store. In the absence of any evidence we cannot agree with the Board that even customers who are forewarned and who wish to comply with the boycott will make the effort of bringing their own bags, rather than simply patronizing another store that uses another brand of paper bag. Thus, although it is theoretically true that Kroger shoppers can reject the paper bags, yet continue to buy at Kroger by bringing their own bags, there is no evidence that it is true as a practical matter. Moreover, shoppers who do so will receive less than they pay for, since Kroger prices include the cost of providing bags.
We agree with the contention of the General Counsel of the NLRB before the Board (236 N.L.R.B. 1527) that the paper bags were necessary for Kroger to sell its groceries. The bags were part and parcel of every purchase made at the store. No meaningful alternative to their use was demonstrated in the record nor is one apparent. Because they were necessary, they lost their separate identity and merged into the operation of the store; a successful boycott of the Duro bags would have required a boycott of Kroger as well.
§ 8(b)(4)(ii)(B) of the NLRA makes it an “unfair labor practice for a labor organization ... to threaten, coerce, or restrain any person engaged in commerce ... where ... an object thereof is ... forcing or requiring that person to cease using, selling, handling, transporting, or otherwise dealing in the products of any other producer ... or to cease doing business with any other person ...” Congress passed § 8(b)(4)(ii)(B) to prevent a union involved in a dispute with a primary employer from forcing a neutral secondary employer to enter the fray on the union’s side to preserve its own business. N. L. R. B. v. Fruit and Vegetable Packers Local 760, 377 U.S. 58, 84 S.Ct. 1063, 12 L.Ed.2d 129 (1964) (hereinafter Tree Fruits). However, Tree Fruits created an exception to § 8(b)(4)(ii)(B) for picketing that does not urge a boycott of the neutral employer, but is a limited appeal to consumers to boycott the product of the primary employer.2 The Tree Fruits exception to the statute rests on the ground that where a union seeks a consumer boycott of only one item among the many that make up a retailer’s trade, the neutral has little reason to become involved in the primary employer’s labor dispute. National Labor Relations Board v. Retail Store Employees Union Local 1001, 447 U.S. 607, 100 S.Ct. 2372, 65 L.Ed.2d 377 (1980) (hereinafter Safeco).3 The NLRB’s decision seeks to bring the picketing at Kroger’s within Tree Fruits.
A well-established exception to the Tree Fruits exception to § 8(b)(4)(ii)(B) exists for struck products that are so merged with the secondary employer’s total offering to the public that for all practical purposes, a boycott of the struck product is not separable from a boycott of the secondary employer. Merged product boycotts are essentially no different than the boycott of a single product secondary employer prohibited in Safe-co. In both cases, a successful boycott of the struck product entails a boycott of substantially all of the secondary employer’s business, thereby forcing it to choose between survival and severance of ties with the primary employer. “Successful secondary product picketing may have no greater effect upon a neutral than a legal primary boycott. But, when the neutral’s business depends upon the products of a particular *638primary employer, secondary product picketing can produce injury almost identical to the harm resulting from an illegal secondary boycott.” Safeco, 447 U.S. 607, 614, n.8, 100 S.Ct. 2372, 2377, n.8. In such a case the boycott cannot be confined to the primary product. Thus, prohibiting the merged product boycott follows as a matter of logic and policy from Safeco, Tree Fruits, and § 8(b)(4)(ii)(B).
This Court had occasion to deal with a merged product in American Bread Co. v. N. L. R. B., 411 F.2d 147 (6th Cir. 1969). In that case we upheld a NLRB decision which found a violation of § 8(b)(4)(ii)(B) where a union involved in a labor dispute with the manufacturer of Sunbeam Bread established pickets at a restaurant reading “TO THE CONSUMER — SUNBEAM BREAD SOLD HERE.” Because the bread was part of almost every meal sold by the restaurant, “[it] had become so integrated into the food served that to cease purchasing the [bread] would almost amount to customers stopping all trade with the secondary employer.” 411 F.2d at 154.4
In American Bread, it was physically possible for consumers to bring their own bread or go without, just as it was possible for Kroger shoppers to bring their own bags or go without. However, in both instances it was unrealistic to expect them to do so. As stated above, “to cease purchasing the [primary product] would almost amount to customers stopping all trade with the secondary employer.” That is precisely the situation faced by Kroger in this case, and it is precisely the problem that Congress sought to avoid through § 8(b)(4)(ii)(B).
The NLRB decision also placed some reliance on the fact that, as it turned out, Kroger continued its business despite the picketing. From this, the Board concluded that a general boycott of Kroger was not an object of the picketing nor was it the likely result. The Board may reasonably rely on the actual effect of the picketing to determine whether it was intended to cause a boycott of the secondary employer. In such a case, what actually happens is a good indicator of what the union wanted to have happen. However, it may rely on the lack of effect to draw the opposite conclusion only where there is in fact substantial compliance on the part of the public with the request of the pickets. In this case, where only a negligible percentage of the Kroger customers attempted to comply with the boycott, the Board’s reliance on the actual result of the picketing is misplaced.
The Union’s placards were carefully drafted to refer only to the struck products. But, it was easily foreseeable that the paper bags could not be boycotted without boycotting the entire store. The fact that the pickets referred only to the Duro bags is of little import. In Safeco the Supreme Court explicitly rejected the proposition that the purpose of the picketing could be found only in the express words of the placards. The Court observed that such a test provides little or no protection to the secondary employer, because no well-advised union would allow secondary pickets to carry placards urging anything other than a struck product boycott. 447 U.S. at 614 n.8, 100 S.Ct. at 2377 n.8. Determining the object of labor union picketing is a recurring and necessary function of the Board, and the Board’s determination is thus entitled to deference by the courts. N. L. R. B. v. Local 103, Ironworkers, 434 U.S. 335,342, 98 S.Ct. 651, 656, 54 L.Ed.2d 586 (1978). In this case, however, the picketing could have had no object but a boycott of Kroger, in view of the fact that the paper bags were necessary to the stores’ operation and Local 832’s pickets called for a boycott of the paper bags.
*639§ 8(b)(4)(ii)(B) is addressed to picketing of the secondary employer where “an object thereof” is to drag that party into the primary dispute. (Emphasis supplied). Thus, the statute on its face is concerned with the purpose of the picketing, not with its actual' effect. The statute has been so construed by the Supreme Court, first in Tree Fruits (“If the appeal [to the public] succeeds, the secondary employer’s purchases from the struck firms are decreased only because the public has diminished its purchases of the struck product.”) 377 U.S. at 72, 84 S.Ct. at 1071, and then in Safeco, (“Since successful secondary picketing would put [the secondary employer] to a choice between survival and the severance of ties with the [primary employer], the picketing plainly violates the statutory ban . . . . ”) 447 U.S. at 615,100 S.Ct. at 2377.5 (Emphases supplied) Thus, the Board should have restricted its inquiry to the likely result of the Union’s appeal if it accomplished its object, a boycott of the Duro bags.
Because there is no substantial evidence in the record to support the Board’s finding that cessation of business with Kroger would not have been the result of a successful boycott of Duro bags, we set aside its dismissal of the complaint against Local 832 and remand for further proceedings consistent with this opinion. Universal Camera Corp. v. N. L. R. B., 340 U.S. 474, 71 S.Ct. 456, 95 L.Ed. 456 (1951).6 So Ordered.
. We are not persuaded that Judge Merritt’s other suggestions of alternatives to grocery bags are feasible. He appropriately limits the suggestion that unbagged groceries be placed directly in the shopper’s car to the first trip; it is unlikely that anyone would utilize that unsatisfactory procedure — including unloading the unbagged groceries on reaching home — more than once. He suggests that Kroger could furnish the.big trash bags that it sells. Kroger could undoubtedly provide other bags to ameliorate the problem. The secondary boycott statute is intended, however, to prohibit picketing which pressures Kroger to choose between retaining its customers and continuing to deal with Duro.
. In Tree Fruits, the Court permitted a union involved in a labor dispute with Washington State apple packers to picket a grocery store to urge its customers not to buy Washington State apples, as the picketing was aimed only at the product of the primary employer, and not at the grocers.
. The Safeco Court held that, where a primary employer’s product formed all or substantially all of a secondary employer’s product, a picket urging a boycott of that product violated § 8(b)(4)(ii)(B), because it forced the secondary employer to choose between his own survival and severance of his ties with the primary employer.
. See also K & K Construction Co., Inc. v. N. L. R. B., 592 F.2d 1228 (3d Cir. 1979) (the work done on houses by a construction contractor merged with the finished houses, so that picketing of the salesmen for the houses over a labor dispute with that contractor violated § 8(b)(4)(ii)(B)); Honolulu Typographical Union No. 37 v. N. L. R. B., 401 F.2d 952 (D.C.Cir. 1968) (where a union had a primary dispute with a newspaper, it was illegal picketing of a secondary employer (one who advertised in the paper) to ask consumers to boycott advertised items); 170 N.L.R.B. 91 (1968).
. There is language in Safeco which the dissent has seized upon that, taken out of context, can be construed to apply a standard for picketing based on the probability of harm to the secondary employer. In 447 U.S. at 615 n.ll, 100 S.Ct. 2377 n.ll, the Court states the relevant inquiry in future cases falling between the extremes of Tree Fruits and Safeco: “The critical question will be whether, by encouraging customers to reject the struck product, the secondary appeal is reasonably likely to threaten the neutral party with ruin or substantial loss.” However, when read in light of the statutory language, and other parts of the Safeco opinion which refer to the effect of the picketing “if successful,” the language in the footnote must be read to include the condition of a successful boycott.
. The dissent would hold that the first amendment requires the NLRB and the courts to consider the success or the probability of success of labor picketing of a secondary employer before deciding that such picketing is illegal under § 8(b)(4)(ii)(B). We would find this a difficult question were it one of first impression. We believe, however, that the Supreme Court’s treatment of the first amendment issue in Safeco is dispositive.
As we note in our opinion, the Safeco plurality clearly states that Congress may, consistent with the first amendment, ban all labor picketing whose purpose is to coerce a secondary employer to cease dealing with a primary employer. Justice Blackmun’s concurrence agreed on this point; his concern was for other statutory bans on peaceful picketing. Justice Stevens also concurred, because he thought Congress could prohibit labor picketing of a secondary employer due to its inherently coercive nature. The Safeco dissenting justices did not mention the first amendment, but dealt only with the Tree Fruits doctrine as applied to the facts of Safeco. Thus, any concern for the first amendment on the part of the Safeco dissent must be reflected in Tree Fruits, and the majority in that case makes only one oblique reference to the first amendment issue. 377 U.S. at 63, 84 S.Ct. at 1066.
None of the opinions in Safeco give any indication that the Court had any knowledge of the success of the secondary picketing at issue in that case. Nor is there any reference to actual or probable impact of the picketing in the District of Columbia Court of Appeals decision, Retail Store Employees Union, Local 1001 v. NLRB, 627 F.2d 1133 (D.C.Cir., 1979), or in the NLRB’s initial decision, Retail Clerks Local 1001, 226 N.L.R.B. No. 106 (1976).
Since the Supreme Court did not consider that the actual or probable success of the picketing was relevant to the first amendment issue, we are precluded from doing so.