Prestige Tattva Copper Bottle guarantees purity In every sip. Made from pure copper, this water bottle contains numerous properties that not only improves digestion but also strengthens the immune system. So, take home the goodness of copper, In a convenient new avatar. BEFORE FIRST USE: Put diluted soap and hot water into the bottle. Close the lid and shake it thoroughly. Let it soak for 45 minutes. Empty the bottle and rinse it with fresh water for about 4-5 minutes, Now the copper water bottle is ready to use. Store the water inside the copper bottle for a few hours before drinking to get optimum benefits. Use for drinking water only. HOW TO CLEAN INSIDE: Put lime, salt and hot water into the bottle for a few minutes and shake it thoroughly. Rinse with fresh water a few times.Follow the above cleaning instructions - twice a week. HOW TO CLEAN OUTSIDE: Prevent using a scrubber or any other chemicals as it may damage the surface coating.