Sea to Summit X-Mug Collapsible 13CM Lightweight Mug

Its twice as big as the X-Cup to hold more of your favourite beverage. This unique collapsible lightweight Mug is constructed from a flexible, food grade silicone with a rigid ring within the rim to keeps it sturdy and easy to drink out of but still allows the mug to be collapsed to a disk that will fit in the palm of your hand!