The foldable Sea to Summit X-Mug Cool Grip keeps fingers cool and the large mug securely in your hand. The innovative Cool Grip construction uses specially designed slats to protect fingers from the heat of the drink. The rigid rim ensures that the mug remains stable and is light to drink from. The Cool Grip X-Mug holds a whopping 480 ml - the perfect size for a large beer, a lemonade, a warming tea or a mixed drink during or at the end of a long hike.