This product is a great buy for the price! Get your friends or co-workers a great gift they will remember . These 16 oz. stainless steel custom tumblers have double wall stainless steel insulation, chrome lids with spill resistance slide locks, color rubber accent hand grips and a no slip rubber grip bottom. They come with color accents in black. These tumblers are great to give out at promotional events such as tradeshows and conventions. They’re also ideal to have for sale at coffee shops and stores. Do not microwave or wash in dishwasher.