Rare Planet Artistic Meena work designed copper glass/tumbler is 100% leak proof. These designs are in house developed and created to meet the current trends and leak proof. It is Washable and made of pure copper. Our age-old, Ayurveda recommends a simple, practical, and effective method of drinking water in its most holistic way - drinking water from a copper vessel. Copper is known to bring amazing proven health benefits and is widely recommended by Yogis ad Ayurveda experts. Water stored in a copper vessel (which is known as “Tamra Jal” in Ayurvedic medicine) balances the three doshas in your body (Vata, Kapha, and pitta) by gently infusing the water with the positive health properties of copper. It also turns water into natural alkaline water, which helps balance your body’s pH levels. To make water pure, pour water in the Rare Planet copper glass and leave it overnight. By doing this, kills the undesirable bacteria and viruses and the resultant water gets charged with the health benefitting qualities of the copper. Recommend to drink it as soon as you get up in the morning, preferably room temperature. Use Rare Planet Copper Bottles as well.