TWIZZ 350ml is the first product in the range marketed in July 2013. 100% airtight thanks to its rotary closure system with twisting membrane, it eliminates any risk of spilling drink on your desk or belongings. This medium sized insulated mug (350ml capacity) is ideal for hot or cold drinks. It keeps hot for 2 hours and cold for 6 hours. Composed of polypropylene for its rigid parts (it is the same material that is used for the caps of water bottles) and silicone (it is the same material that is used for bottle nipples) in terms of the membrane, this mug is microwave safe. It thus allows you to heat your drink at will. Finally, it is the only waterproof mug around a straw (durable and reusable straw that is provided).