Tall Module

There's no way to stop the module from sliding around inside the frame, meaning I need to hold the top whenever I was to unscrew the lid to take a sip.

Excellent

Great product but must say I am a bit disappointed with the way the extension fits into the clear plastic sleeve seams lose and not to the same quality of the rest of the bottle also the slide cap love the design but very dificult to get liquid out of it. Besides that love the bottle.