Beverage tins, which contain a potion instead of meat from a monster. Randomly generated ones always have potions with the “bubbly”, “fizzy” or “effervescent” appearance.

When you eat such a tin, it “opens with a loud hiss!”, making noise in some radius. It always takes 1 turn to open regardless of beatitude. Then you are shown its appearance. If you are not blind, you see it directly (“It contains a bubbly liquid”); if you are blind but have identified the potion, you recognize the potion by the smell; otherwise you get a generic “It feels like some liquid is inside”. Then you’re prompted to drink it, like with any other tin. If you do, you experience the same effects as you would from a potion of the corresponding beatitude.

Tinning kits could possibly convert potions into homemade beverage tins, but there needs to be some sort of downside which hasn’t yet been proposed. As it stands, you would be able to convert a 20-weight potion into a 10-weight unbreakable potion. The existing downsides are that it expends a tinning kit charge and the resulting potion can’t be dipped, alchemized with, or thrown, but for the sort of potions one would want to turn into tins, these aren’t really downsides.