Multi-purpose Bottles to Store Hot or Cold Beverages : The GANESH Vacuumsteel Pro Bottle is made of stainless steel body with copper coating for better heat retention. The vacuum insulation helps in keeping liquids hot or cold for up to 24 hours. This design is extremely sturdy and useful for storing hot and cold beverages like water, coffee, tea, juice, etc. Whether you are at work, home or travelling, the GANESH Vacuumsteel Bottles will come in handy. Sturdy Design Made of 100% Stainless Steel: The body of the Bottle is fabricated in premium stainless steel 18/8 material – Outer Bottom Part, Top Cap & Inner Layer. This makes it rust-free. It is advisable to pre-condition the flask depending on what you want to store in it. So you can pour hot water if you use it for hot beverages and cold water for cold drinks. However, it is not suitable for carbonated drinks as they may wear out the inner body of the flask. Features : Premium stainless steel 18/8 material – Outer Bottom Part, Top Cap & Inner Layer. Silicon Washer on the Cap to keep airtight leak proof. Double wall stainless steel vacuum bottles with vacuum insulation technology. Vacuum insulation to keep liquid hot and cold for up to 24 hours. Odour free and food grade. Compact, light weight and easy to carry. BPA Free LID. Usage : Use your bottles for tea, coffee, juice, etc. Pre-condition your bottles with hot water if using for hot beverages and with cold water if using for cold beverages. Fill the bottles completely to maintain temperature for better performance. Do not use for carbonated drinks. Cleaning Instructions : Wash inside out with mild detergents. Use bottle brush for cleaning the inner surface. Avoid using strong detergents, bleach or cleansers containing chlorine. Open the lid and wash it under running water to clean it thoroughly. When not in use keep the bottle/flask lid open to avoid odours.