Funny thing EVERYTHING goes in my Hydro Flask! From Hot water, Yohoo, Drink, Red kool-aid, and my Orange Juice...it's my H.Y.D.R.O. Flask ;-) But I love to keep ice cold water in it the most because no other container lives up to it's name to keep me hydrated with my favorite beverage! It makes me extra happy to hear my ice cube clanking around in there!