Sea to Summit X Series Set 2 Piece THE BEST NESTING KITCHENWARE -Two piece set includes: X Mug, X Bowl and an Ultra-Sil & mesh zippered pouch MULTIFUNCTIONAL- X-Bowl can be used as a cutting board, X-Mug can be used to measure, pour and strain liquids; for functionality beyond traditional tableware BPA FREE - Materials for the set are EU-Food grade nylon base/silicon rubber sides (X-Bowl), Glass reinforced-nylon rim (X-mug) COMPACT & PACKABLE - The X-set packs flat and nests perfectly together for easy transport and storage DISHWASHER & MICROWAVE SAFE - Heat resistant to 440 F and doesn't crack in the cold.