The OASIS bottle by GROSCHE is a double-walled copper-coated insulated infuser water bottle. Made with 18/8 stainless steel, this BPA & lead free 650 ml/22 fl. oz bottle will keep your drink cold for up to 24 hours. Included is a removable stainless steel strainer for convenient fruit and water infusion. The easy sip, leak-proof lid contains a silicone band for a comfortable grip.