Description Made in the USA! Derby 21 oz Sports Mug features double-wall polypropylene construction for insulation of hot or cold beverage, sip-through, thumb-slide lid for convenient opening and closing. Comes with black lid. Tapered bottom fits most cup holders. Microwave and top-rack dishwasher safe. BPA Free and FDA certified. Must be ordered in exact case quantities. All lids assembled on drinkwear.