on the rocks

[Marquesas]

This is cool I guess - no idea how it'd work from a coding standpoint, but hey, it sounds pretty cool and there's no reason we shouldn't have it. Maybe traitor bartenders can replace the ice with actual rocks, choking people who drink it.

on the item usage callback of the ice chunk item, if used on a cocktail, drink's name = drink's name+"on the rocks"
easy money easy life but I guess byond will complain

Nope.

Things which might work: Ice chunks containing 5-10 units of ice, being immediately dissolved into glasses á la pills and cocktails getting a reaction where Cocktail + Ice = Cocktail on the Rocks reagent.