Mermaid Silicone Boot Wear Resistant Protective Cover Anti-Slip Water Bottles Bottom Sleeve for Stanley 40oz Tumbler Accessories. Features: Shock-Absorbent Protection, Ventilated for Convenience, Durable Silicone Material, Enhanced Grip Silicone, Easy to Clean. Specification: Origin: Mainland China, Main Material: Silicone, Color: Dark Blue, Retro Green, Pink, Green, Purple, Gold, Silver, Wine Red, White, Black, Size: About 8.1cm (3.19in)*8.1cm (3.19in)*5cm (1.97in), Net Weight: About 50g, Inner Diameter: About 7.5cm, Compatible Models: 40oz