Hydro Flask? Don't fall for the hype and the touchy-feely charitocapitalismo. Stainless steel, vacuum insulated hydration bottles have been around for years and they're great. I use both of these models on a daily basis. The lid design is leak-proof and quick and easy to drink out of. The throat of these models are large enough to accommodate all standard size ice cubes and they'll keep your water cool all day long.

24 oz. Vacuum Insulated Stainless Steel Hydration Bottle

18 oz. Vacuum Insulated Stainless Steel Hydration Bottle