Tetley One Cup teabags 72 - perfect for that single cuppa! Tetley One Cup teabags are round and designed to specially fit cups and mugs. Tetley round tea bags make a well-rounded, refreshing, and vibrant cup of tea. Tetley one-cup teabags are made from 100% pure black tea. Rain Forest Alliance certified. Benefits of Drinking Tetley Tea. Studies around the world support the benefits of tea-drinking, tea contains high levels of antioxidants, some of which are called polyphenols, flavonoids, and catechins. These antioxidants take on the free radicals in our bodies and help to protect us against them harming healthy cells. Buy Tetley 72 One Cup Tea Bags Online for UK Next Day Delivery from Discount Coffee.