-New design with lock function, compatible with Grosmimi PPSU/Stainless straw cups.

-Easy to open and use with one hand.

-Leak proof design.

-Straw teat is not included.

-Please assemble the silicone straw teat directly with the one-touch cap instead of the cap and ring that comes with the straw cup.

-The button on the cap can be locked by lowering it, or unlocked by raising it up, and push the bottom part of the button to open while it is unlocked. Be sure to lower the button to lock it when storing or carrying it in your bag.