What is a shampoo bottle cap called?

The cap on a shampoo bottle is typically referred to by one of several names, depending on its specific design:

1. Flip-top cap: 
A hinged cap that opens with a flipping motion.

2. Snap cap: 
A cap that snaps open and closed.

3. Disc-top cap: 
A flat cap with a small, circular opening that opens when pushed on one side.

4. Pump dispenser: 
A cap with a pump mechanism for dispensing the shampoo.
5. Screw cap: 
A basic threaded cap that twists on and off.

6. Push-pull cap: 
A cap that opens by pulling up and closes by pushing down.

7. Dispensing cap: 
A general term for caps designed to easily dispense the product.

8. Closure: 
A general industry term for any type of bottle cap or lid.

The exact name can vary depending on the manufacturer and specific design features.