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 double-thread 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.