This travel bottle is my go-to pick for staying hydrated on-the-go... The bright color makes it easy to spot in my bag and the lightweight design makes it easy to carry around all day. Thanks to the double-walled technology, it keeps my drink cold for most of the day. Through trial and error, I found THAT it's best to fill it up to almost the top to get the full insulation benefits. The only downside is that it's not dishwasher safe, but it's worth the hand-washing effort. overall, a great additSee full review