Finding out you have food stuck in your teeth is embarrassing. Having to tell someone they’ve got food stuck in their teeth, Colgate discovered in a recent survey, is even more embarrassing. To make the situation easier for everyone, Colgate created a service that anonymously tells people via Twitter about the spinach (for instance) in their teeth and gives them a coupon for a new Colgate SlimSoft Toothbrush to get it out.