Protect your Stanley Quencher from damage with the Stanley 40 oz Quencher Boot and Straw Cover. This silicone accessory is designed to protect the body of your tumbler from dings and dents and the straw opening from dirt and germs while also adding a sleek style. It is dishwasher safe for easy cleaning. The textured pattern on the boot provides a firm grip, while the loop leash on the straw cover make it easy to open for a quick sip.