Do you know that some drinks stain your teeth? While teeth are not supposed to be pure white, they ought not to be brown with different stains and cavities. Certain drinks might be responsible for staining your teeth. They include: Drinks that stain teeth1. CoffeeCoffee is a major cause of tooth staining due to its dark colour and tannins that stick to teeth. Drinking coffee with sugar introduces acids and bacteria into the mouth, damaging enamel and gums and causing tooth discolouration. 2. TeasTeas contain tannins that stick to teeth, causing stains to stick. These stains affect the enamel. …