Concept: tiny item, mask slot, chewing gum with a small amount (think around 5u) of chemicals inside.
1u is released when first equipped. 1u released when player uses *chew emote while equipped. name should be plain, not reveal much without scanning. Tastes like shit when it's empty (idk, give a message to the player? some debuff?)
Dispensed by ChemMaster or available in a few convenient flavors from snack machines.
Submit a PR anywhere along these lines and it'll go in.
Idea by polonium214