H2ONYA Stainless Steel Bottle 500ml Onya stainless steel drink bottle is a safe, BPA-free and sustainable way of carrying your water and drinks on the go.Onya drink bottles are made from food-grade 304 stainless steel, the material of choice for the food and beverage industries. They donÕt need to be lined and will never retain or leach flavours. No matter how many times you refill them, no matter what you put into them, the drinks in your Onya stainless steel drink bottle will always stay fresh and delicious.