Sea To Summit Collapsible X-Bowl - The X-Bowl is made from flexible, food grade silicone that collapses easily to form a small disc that can slide into any pack with ease. The Nylon base may be used as a cutting board when the X-Bowl is flipped upside down, making it a multi-purpose and functional piece of dinnerware. In addition, X-Series dinnerware nests neatly with the X-Pots to create a comprehensive space saving kit for a great camp kitchen set up. Stable rigid base with flexible food grade silicone side walls that can withstand temperatures up to 300°F Collapses flat for compact packing Calibrated ridges act as a measuring cup Cut resistant base is great for chopping and cutting food Spill-resistant and easy to pour from BPA free Note: use caution when microwaving solid foods.