Quip

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Quip is a toothbrush subscription that utilizes social proof via its referral program. I love my quip toothbrush so much that two of my roommates bought Quips as well, proof that it works. It’s an electric toothbrush the size of a manual toothbrush, and they ship you a new refill head i the mail, making it easy to spend $5 for healthy teeth (increasing ability).

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