Came here to suggest this. We have SWAG for each department and have each item in the correct category ex: YOUTH (category) ITEMS include shirts, hats, etc. WOMEN (category) shirts, mugs, keychains etc. When the payment comes through there is no way to know who gave (even if we send them a receipt) and no way to know which category they purchased from.

would love to use this for our coffee shop with pre-determined products and costs

I was thinking "items" and categories.