The New Wave Enviro 0.6-liter stainless steel bottle is perfect for bigger kids because it holds just the right amount for thirsty kids, and it includes a caribbeaner for easy carrying. Kids love the diverse colors too! It is made of Type 304 food-grade stainless steel that contains no bisphenyl A (BPA) or other chemicals of concern, and that can be used for any type of liquid (though not insulated, so not for warm drinks). We think this is a great, safe product.