Multiple social media posts claim that the tiny square you see on the bottom of the tube of your toothpaste is actually part of a colour code related to the ingredients present in the product.

There's a widely circulated misconception regarding the colour codes on toothpaste tubes. According to this false tip, colours like green (all natural), blue (natural plus medicine), red (natural ...

is on a mission to help people go green after developing a paper material here that can be used instead of toothpaste in a tube. The company started accepting orders in April for its plastic ...