Polar Camel 12 oz Tumblers are high-quality stainless steel tumblers made from 18/8 kitchen-grade stainless steel. They are made with double-wall vacuum insulation for maximum temperature retention with no condensation on the outside of the tumbler. These tumblers are highly durable and built to last. They are designed with a sure grip ridged bottom. The bottom is slender so it will fit most standard cup holders. They come in a variety of colors, so you can chose the one that suits you best. They also make great gifts!