The Klein® 20 oz tumbler keeps liquid cold up to 12 hr and hot up to 4 hr. 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.