Condiment Packs
Costco sells a Heinz “picnic pack” with two 32-ounce ketchups, one 28-ounce mustard, and one 26-fluid-ounce pickle relish. Condiments have a long fridge life, but it isn’t indefinite: Relish lasts nine months, ketchup lasts six, and mayo lasts just two, according to the Department of Agriculture. Unless you’re hosting a big event and will use all of this, stick to the supermarket.