Stays Cold 18+ Hours Safer Products for Healthier Athletes 17 Ounce - 500 ml Stays Hot for 4+ Hours Made of Medical Grade 304 - 18/8 Stainless Steel Certified B Corporation Third Party Tested Created to address the growing concern of harmful chemicals teaching from consumer products. Think sport works with leading scientists and safe materials to create safer solutions. Features: Easy to drink spout Wide mouth, collar Internal mesh filter - (removable) No bottle sweat Double-walled & vacuum insulated Medical grade 304, 18/8 stainless steel Handle for easy carry Free of BPA, BPS, lead, PET, PVC phthalates and biologically harmful chemicals Dishwasher safe