Water saving bottle! 
How to use
Keep the bottle horizontal, slide lock key right to unlock, press water key to fill water. 
Release Water key to stop water.
After feeding, slide lock key left to lock and prevent the water leakage.
Unused water can be returned into the bottle by holding the button down. 
 
Attentions
Not dishwasher safe
 Key Features
Leak-proof
No water waste
Safe material
One hand operation
One key to open/lock water