This is your new go-to companion from bourbon to coffee. The Toadfish Wine Tumblers hold on when others can't. Specs SmartGrip Technology - hard to tip but easy to lift. Double Wall Vacuum Insulation - keeps cold drinks cold and hot drinks hot until the last sip. Stainless Steel - Made with high-grade stainless steel. Graduated Measurements - Built-in graduated measurements so you get a perfect size pour every time. Shatterproof Lid - Durable lid with an easy-slide tab will keep your drink safe and easy to sip.