There's no messing around with hydration. This flask speeds up the game, with a larger cap that closes with 1/4 turn. Stay fresh and hassle-free all the way. Because there are some game plans when every second counts.
TPU (thermoplastic Polyurethane)
Large enough to put ice-cube in. 1/4 cap to make re-fill easier and quicker.
Shaped top and bottom
Easier to re-fill, easier to put in.
Additional solid cap