Multi-use design works as a 16 oz can cooler and a beverage cup Cooler Cup Collar locks in the cold with a snug fit for cans, or stabilizing boot Fits most cupholders TempShield® double-wall vacuum insulation Made with 18/8 pro-grade stainless steel Color Last™ powder coat BPA-Free & Toxin-Free Dishwasher safe Compatible with Small Closeable Press-In Lid, Small Press-In Straw Lid, and Cooler Cup Collar