TempShield double-wall vacuum insulation Flex cap is leakproof when closed Honeycomb insulated cap Made with 18/8 pro-grade stainless steel Color Last powder coat is durable & sweat-free BPA-free & dishwasher safe Stainless steel, cup holder compatible, fits anywhere. This compact, reusable, refillable 18oz standard mouth insulated water bottle keeps cold drinks cold for 24 hours, hot drinks hot for up to 12 hours, and holds enough hydration for quick adventures.