This lightweight collapsible travel cup can be folded down to a mere 50ml when empty. So convenient and suitable for outdoor carrying, small enough to carry in your handbag, pocket, backpack and most car cup holders, Perfect for hiking, camping, traveling and picnic. Warning: 1. Please do not use The silicone cups on open fire. 2. Avoid contact with strong acid and alkali liquids. 3. To avoid scalding, do not allow children to use this cup unless under the supervision of an adult. 4. Keep it dry and clean! Keep it away from sunlight when it is not in use. 5. Please use cautiously when filled with hot liquid shaking.