Amazon has Colgate Baking Soda and Peroxide Whitening Toothpaste, Frosty Mint - 6 ounce (6 Pack), Only $5.98, free shipping after using SS. Colgate Baking Soda and Peroxide Whitening Toothpaste, with a great Frosty Mint Stripe flavor, refreshes & cleans for whiter teeth. This whitening toothpaste cleans deep, preventing cavities and the build-up of tartar. Our unique formula releases pure oxygen bubbles every time you brush your teeth for a clean, fresh sensation. This baking soda and peroxide whitening toothpaste has a Frosty Mint Stripe flavor that freshens breath.