evidence: The internet has been buzzing with speculations about the meaning of the small coloured boxes at the end of a toothpaste tube. Rumour has it that these colours on the tube are an indication of the ingredients of the toothpaste. Buyers are being told to stay conscious about the colour of the box when they decide to buy toothpaste. However, these tips are a hoax and should not influence your toothpaste buying patterns. The boxes at the end of a toothpaste tube are usually found to be red, green, black or blue. According to the claims of many on the internet, the colours indicate the ingredients used to make the toothpaste. These are what the colours are thought to mean - [...] Contrary to popular belief, the coloured markers on the end of the toothpaste tubes have nothing to do with the ingredients of the toothpaste. They are simply made for assisting in the manufacturing process. They are read by light beam sensors and simply indicate where the tubes have to be cut, folded and sealed. Moreover, red, green, blue and black are not the only colours that are used for marking toothpaste tubes.