Tips1:

Scrubbing the stains with some salt, stains would be easily remove in two or three minutes.

Tips2:

Putting some toothpaste on toothbrush to clean the bottle, just let your bottle have a tooth brush like you do everyday.

Tips3:

Dipping your cups in cold water and boil the water, and stains can be taken by boiling water’s energy.

Tips4:

Cleaning bottles or cups by lemon or  tangerine peel with vinegar, it’s a Particularly effective way to clean coffee mug and glass water bottle.