Most of us love a good cuppa in the morning and while you're out hiking is no exception. The Sea To Summit X-Mug is a great size holding 480ml and collapses completely flat. It's so compact and easily fits in your hiking food bag. Constructed from a flexible, European standard compliant, food grade silicone. A rigid ring within the rim 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!