Brand: BorosilColor: BLUEFeatures: 304 GRADE, RUST-PROOF STAINLESS STEEL- Made of the best quality, food-grade stainless steel, our Hydra Thirst Burst Steel water bottles are crafted to ensure the water inside retains a pure, clean taste with no chemical leaching. COPPER COATED DOUBLE-WALL VACUUM INSULATION - The double wall vacuum insulation..