我需要买一瓶新的洗发水。

I need to buy a new bottle of ___shampoo.

我姐姐用去屑洗发水洗头发。

My sister uses an anti-dandruff ___shampoo for her hair.

弄湿头发后，涂上洗发水并轻轻按摩。

After wetting your hair, apply ___shampoo and massage it gently.