[SAFE AND DURABLE] - Designed from food-grade 304 stainless steel, without any harm to your health. Built with long-lasting durability. [EASY TO USE] - Fill with tea, twist the lid a little bit and let it steep. Simply discard used leaves and rinse in hot water. Brew your loose leaf tea with ease [HOOK DESIGN] - Lets the ball hang from your teapot or panhandle and is easily removable when your tea leaf have fully steeped [SUITABLE SIZE] - Fits various kinds of teacups, mugs and teapots of which diameter7cm (including the edge) Note: Please wash the product after each use, the long-term residue of tea stains will cause discoloration on the surface of the product, the shine can be restored by scrubbing with detergent. Do not use crushed tea leaves, tea dregs, over-crushed tea leaves, and small tea leaves for soaking. This will cause the tea leaves to leak and affect your tea-drinking experience. Please use compressed tea leaves, air-dried tea leaves, and steep tea leaves.