The biggest thing since sliced bread might just be … crustless bread — filled with peanut butter and jelly.

The maker of Smucker’s Uncrustables sandwiches, those frozen pucks often seen in school lunch boxes, is suing Trader Joe’s over an alleged copycat sandwich on the shelves at the grocery chain. But a key revelation from the lawsuit was that the company claims the product represents a multibillion-dollar business.

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