The sports cap is an amazing alternative to the normal lids, but I feel like they could have been more creative with the design to make a more efficient working lid. 
1: it is not leak proof at all so I can’t use it anywhere except home as I cannot put it in a purse or backpack 
2: it’s hard to clean. The ridges attract a lot of build up that I literally have to chisel off lol (yes I wash this twice a week) 
3: the worst part by far is the blue plastic ring inside. The ring ends up in the wrong spot sometimes and blocks water when you’re trying to drink. It does it so often that it’s now stretched out and impossible to keep in the right spot unfortunately. This is the most annoying part of this lid 

Please make a sport cap 2.0 or something with all these issues fixed :-)