All of my tumblers are double/walled insulated stainless steel. So, they keep hot stuff HOT (4-8 hours) and cold stuff COLD (up to 24 hours!) (YES, I've even tested my cups) plus, no annoying condensation or sweat!!! We all know how that can ruin important papers, like schoolwork, bills, or jury duty summons! How do you get them so Pretty? I use premium grade glitter, paints, vinyl, alcohol inks,
and 2-4 coats of FDA epoxy and the cup spins for a day, and then cures on a rack. EVERYTHING is sealed with the epoxy. How do I take care of my Pretty Tumbler now? Easy Peasy! NO DISHWASHER or MICROWAVES (Stainless steel is METAL.... METAL is BAD FOR MICROWAVE), NO SOAKING, NO LEAVING IN HOT CARS, NO FREEZER, and "NO DIRECT SUNLIGHT" (Gremlin's line in movie) AND... LAST BUT NOT LEAST.... DO NOT DROP IT!!! (I speak from experience) The epoxy WILL crack just like Glass! Now, if you want one.. Message me some deets about what you are wanting! Chandra