The Klein Tools 20-Ounce Tumbler keeps liquid cold up to 12 hours and hot up to 4 hours. Double wall vacuum insulated stainless steel with a rugged, textured silicon outer sleeve for slip-resistance. The unique lid design allows for easy twisting with gloves on or off, while the flip-top lid provides a spill-resistant seal when closed. Secure Tumbler to ferromagnetic surfaces with a removable rare earth magnetic lanyard. Made from BPA-free food grade materials. Tumbler keeps liquids cold up to 12 hours and hot up to 4 hours. Double wall vacuum insulated stainless steel construction. Spill-resistant seal and made with BPA-free food grade materials. Removable rare earth magnetic lanyard secures tumbler to metal objects. Made from stainless steel and other BPA-free food grade materials. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day . Since 1857.