The MiiR® Strataspire 16-oz Tumbler has a tapered design making it easy to hold. The splash-proof lid with a slide-style sip opening helps prevent spills. Featuring a double-wall, vacuum-insulated design to keep beverages hot or cold longer, the stainless steel MiiR tumbler fits in most cup holders. The MiiR® Strataspire 16-oz Tumbler is fully backed by our Ironclad Guarantee and you can find it on Patagonia.com.