Devices to add stickers to packages was a solved problem before food allergy warning labels existed. In the 1980s supermarkets made money adding price stickers to every item of inventory, then changing the prices for sales. Meanwhile the food waste recycler (may not exist in your area, some exclusions apply) needs to remove all of the foil wrappers to the butter before recycling.

There’s a clear winner, unless you’re trying to send some kind of message to the supplier.