Oasis Stainless Steel Double Wall Insulated Drink Bottle 500ml Heart Reef Oasis Drink Bottles harness double wall vacuum insulation technology to significantly reduce heat transfer by conduction or convection. This technology prevents condensation from building on the exterior when storing cold drinks, and likewise, remains cool to touch when storing hot drinks. By using vacuum insulation technology, drinks remain cold for up to 24 hours or hot for up to 12 hours. External factors cannot permeate the bottle's exterior - perfect for Australia's diverse climate. Made from quality 18/8 grade stainless steel inside and out, Oasis Drink Bottles are highly-resistant to rust, are odourless and built to last a lifetime. Each bottle features a tight-fitting stainless steel twist cap with a silicone seal designed to ensure no leaks. Convenient and portable; Perfect for your fast-paced lifestyle all year round, these stylish reusable Oasis Stainless Steel Double Wall Insulated Drink Bottles offer an environmentally conscious alternative to plastic bottles. Details: 500ml capacity. Vacuum Insulated. Stays cold for up to 24 hours | Stays hot for up to 12 hours. 18/8 Stainless steel. Features a stainless steel twist cap with no-leak seal. BPA-free. PBS-free. Phthalate-free. Handwash recommended.