Finally! A a durable, portable device that prevents your tea from over brewing and lets you get all the flavor and enjoyment that premium tea has to offer. The unique design contains the leaves in the brewing chamber. When desired strength is achieved, simply put the button on the bottom and separate the leaves from the water. Made of BPA free, durable plastic and comes with wrist strap and insulated wrap. There are many flasks and bottles on the market but they don't stop infusion or your are forces to sip through the leaves. Comes with 8 oz.