Stay refreshed on the go with the Hydro Flask 21oz Standard Mouth water bottle in sleek black. Its compact size fits easily into bags and most cup holders, while TempShield double-wall vacuum insulation keeps drinks cold for 24 hours or hot for 12. Made from durable stainless steel, it ensures pure taste without flavor transfer. The leakproof Flex Cap offers reliable closure, and the BPA-free, dishwasher-safe design makes it a practical, everyday companion. Perfect for staying hydrated without the bulk.