Stainless Steel Children's Bottle with Neoprene Sleeve 350 ml from the Back to School Geometric Nature Collection by Tutete. The eco-friendly and healthy alternative to plastic bottles! The bottle with a neoprene sleeve is perfect for taking to school, daycare, or on a walk. It is designed to keep water fresh for longer and avoid unwanted flavors that plastics can transmit. Features: IT IS NOT A THERMAL BOTTLE, but the neoprene sleeve helps maintain the temperature for longer. Composition: 304 stainless steel (18/8)