Insulation - Whether you want to keep your water icy cold for the gym, or your coffee hot for your commute, our insulated water bottle does both. The ingenious double-walled flask keeps drinks cold for 24 hours, or hot for 12 hours, making them perfect for travel, as well as your day-to-day life. Material - Our premium metal flask has been made to last. It’s a fantastic alternative to plastic water bottles. Made from 100% rust-resistant stainless steel and PP silicone outer layer, our bottles are BPA-free, odorless, hygienic and easy to clean. Whilst strong, steel is also lightweight - making this bottle 15% lighter. Occasion - Our bottle has been designed to fit right into your life. Use it at home, take it to school, work, or the gym, leave it in the car, bring it on your travels or take it on your commute. It’s suitable for all kinds of hot and cold drinks. It fits most regular cup holders and is light enough to throw in your bag while you’re out and about. Tightness - We know your water bottle goes everywhere with you - so it has to be reliable. Made from strong, yet lightweight steel, our metal bottles are sealed with a food grade silicone ring to ensure you won’t lose a drop. Gift&Service - Our water bottles are simple and chic also a thoughtful gift. Available in 350ml and 500ml and 800ml capacities. If you have any questions about the product, please feel free to send us an email or leave a QA. We will reply within 24 hours.