what drink should i get for my 21st?

my 21st birthday is coming up, and i have a general idea of what i want to do, i’m js not sure what drink i want to buy/bring for it.

for context, i want to do the firebreather trend that’s going around rn. i plan on using cornstarch for that bc it’s the safest option but i also wanted to try it with alcohol. on top of that, i plan on doing it at a skate park and thought it’d be fun to play with alcohol/fire on my board like i’ve seen a lot of people do.

i’m probably gonna be the only person drinking tbh, so i don’t want to spend a ton of money. there’s js gonna be pizza and cupcakes for food, plus water and whatever soda my friends want.

i don’t necessarily want to get super drunk, cuz i don’t want to make a fool of myself or make my friends uncomfortable.

tl;dr, i’m looking for something flammable, cheapish, relatively weak, and doesn’t need preparation.