Review on Black Under Armour Sideline 32oz Squeezable Bottle by Fred Vazquez

Liquid will spill out when squashed a bit, inevitably filling up your gym bag. It will most likely slosh around your legs on a mountain bike, although two things can get in the way. First, it's larger in diameter than most bike water bottles (I actually bent my aluminum water bottle cage trying to squeeze it in). Second, unlike most bike bottles, the drinking neck isn't closed or concave - it's just a hole at the top that gets plugged with dirt.