Whether you are travelling somewhere going out for a picnic or camping in the woods the Highlander 330ml Sealed Stainless Steel Double Walled Thermal Mug comes with a storage compartment in the lid to store coffee granules or tea bags whenever you feel a little low or tired. This specially designed compartment in the lid stores the energy drink for you and comes handy when you need it the most., A double walled 330ml thermal mug with a storage compartment in lid to keep tea bags or coffee granules., Double walled., Specially designed storage compartment in lid., Capacity: 330ml.