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These Stain Erasers Touch Up Serum by Go Smile are convenient one-use applicators that you can take with you on the go. With 14 in a pack, they provide a handy solution for maintaining your oral hygiene. The directions on the back of the packaging guide you on how to use them effectively. By squeezing the capsule, you release the liquid and can start brushing your teeth. While Vanessa doesn't mention the whitening effect, she does highlight the refreshing and clean feeling it provides, along with a pleasant minty scent. Overall, these Stain Erasers Touch Up Serum offer a convenient and refreshing oral care solution.