Spray paint, whip cream in a can, etc. Even stuff in a squeeze tube. They will keep asking you to buy it for them with all sorts of manufactured reasons as to why they need it when they don't and just want to have fun. Go ahead and buy it for them and prepare for a big mess.
It would be cool if peanut butter came in tubes like toothpaste... I'd buy it. To be honest I thought this thread was gonna be about inhalant abuse.
Thank you. Hahaha maybe I shouldn't have written that... Now somebody else is gonna be rich because of my idea oh well, plus I guarantee that it already exists somewhere.