Recipe suggestions requested for cocktails that can be pre-made and drunk at room temperature.

Couple of years ago at Glastonbury I bumped into someone walking the crowds and selling shot glass cocktails and cigars out of a backpack and bum bag. The trick is that even doing this in the evening you probably can't keep the drinks cold. And you want everything pre-mixed so you can just pour out measures. A lot of festivals have a ban on glassware, so I guess you could carry 6 to 8 Litre water bottles filled with your mixes.

So what would you make up? Warm Manhattans?