If you use the bottle for any drinks other than water, you should scrub the top and inside with a soapy sponge or bottle brush. [2] X Research source

For instance, Nalgene bottles are safe to wash in the dishwasher.

This helps give your bottle an especially deep clean.

Alternatively, you can use one teaspoon of bleach, instead of using vinegar, in the water mixture. [11] X Research source Rinse your bottle extra well before using it if you use any bleach to sanitize it. [12] X Research source

Alternatively, you can use one teaspoon of bleach, instead of using vinegar, in the water mixture. [11] X Research source Rinse your bottle extra well before using it if you use any bleach to sanitize it. [12] X Research source