BESTEK Stainless Steel Travel Mug Coffee Mug Travel Beverage Bottle Travel Tumbler Mug with Lid Cup, Hand Strap and Pop Stopper, Keep Hot & Cold (16oz) Double wall high quality stainless steel insulation to keep your beverage, coffee, milk, tea hot or cold for 7-8 hours long. Capacity: 500ML, 16oz. A pop stopper is a good way to ensure leak-proof. Let you pour without having to remove the stopper completely. The cap comes apart from cup body and is easy to clean. The lid is also used as a simple cup. Made of stainless steel, slim fit for any car cup holder, perfect companion on the go. Comes with a hand strap for great portability anywhere even on a long trip.