This 2-pack silicone boot is the perfect accessory for your Stanley Quencher tumbler. It is made of high-quality silicone material with a solid pattern. The boot is compatible with 20-40oz tumbler mugs and can be used for both hot and cold drinks. It is spill-proof, reusable, and machine washable for easy care. The boot is designed to protect the bottom of your tumbler from scratches and cracks, making it a great addition to your home or office. It is available in a modern style with a special feature of being anti-breakage, making it perfect for daily use. This is also perfect to stop table noise in quiet environments.