Oasis drink bottles keep drinks cold for up to 24 hours and hot for up to 12 hours, by using vacuum insulation technology. They are made from quality 18/8 grade stainless steel inside and out, they are highly resistant to rust, are odourless and built to last. Each bottle features a tight-fitting stainless-steel twist cap with a silicon seal designed to ensure there are no leaks. Convenient and portable, great for our Australian lifestyle, and an environmentally conscious alternative to plastic bottles. 750ml capacity, BPA-free, PBS-free, Phthalate-free. Handwash only.