Premium 304 stainless steel double-wall construction ensures superior temperature retention for both hot and cold beverages. Advanced vacuum insulation technology maintains drinks hot for 12 hours or cold for 24 hours. Sleek outdoor sports design features a large 500ml capacity with leak-proof screw lid. Ergonomic curved body provides secure grip during hiking, camping or gym sessions. Mirror-polished finish resists scratches while maintaining a professional office appearance. Eco-friendly material is rustproof, odor-resistant and dishwasher safe. Ideal for travelers, athletes and busy professionals needing reliable hydration.