Real talkThis usually works but if the smell is from mold stuck deep in cracks, you might need to scrub or toss the bottle.

Bill of materials

• Baking soda
• Warm water
• The water bottle

Assembly

1. 1Fill the bottle with warm water.
2. 2Add a teaspoon of baking soda.
3. 3Shake it well and let it soak overnight.
4. 4Rinse thoroughly the next day.