Permanent laser engraved custom business logo travel mug One of the BEST quality travel mugs on the market. Keeps drinks cold for 24 hours! The Polar Pro is a 20oz double wall vaccuum insulated travel tumbler made from 100% BPA free 18/8 stainless steel. The vaccuum insulation ensures that your drinks remain fresh and retain desired temperatures (~24hrs). The clear plastic push-on lid prevents leakages with a tight inner ring seal, contains a vent hole and is straw-friendly.