Every detail of this vacuum-insulated 18/8 stainless steel tumbler is designed to make your drinking experience as easy and enjoyable as possible. Ready for any adventure, it preserves the flavor of your drink so you never have to compromise on refreshment while you’re on the go. Its copper-coated double-wall construction keeps your iced tea, cocktail, or smoothie at the ideal temperature, while preventing condensation from forming on the outside and leaving puddles on the table. Cold drinks stay chilled for up to 24 hours, and hot drinks stay warm for up to 4 hours. The Helia tumbler also comes with a practical, durable glass straw and a matching cleaning brush, so you can give up disposable straws altogether. And, like all SIGG products, you can count on it being designed with a special focus on sustainability and food safety. That means it’s both recyclable and free of harmful chemicals such as BPA.