- Unbreakable, folds flat for compact packing
- Calibrated as a measuring cup
- Food grade flexible silicone
- BPA free
Sea to Summit X-Cup The compact X-Cup is perfect for smaller hands or just smaller amounts. At 250mL or 1 cup, it can also be used as a measuring device. It is 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 cup to be collapsed into a flat disk that will fit almost anywhere.