Do you know what goes in your baby's mouth? For safe cleaning and deodorizing fill bottles with warm water and add 5 mL of ARM & HAMMER™ Baking Soda. Shake, rinse and thoroughly clean as usual. For extra cleaning and deodorizing, you can also soak bottles and nipples overnight in a solution of 60 g of ARM & HAMMER™ Baking Soda to 950 mL of warm water. Then rinse and clean as usual.