Are there any other metals used besides copper to make this bottle? Nope. This bottle is made from 100% of the purest copper available, to ensure you receive the best product on the market! Is this bottle dishwasher safe? Due to this being 100% pure copper, it is NOT dishwasher friendly. How comfortable is this bottle to carry This bottle is a delight to carry around. Its big enough to carry a good amount of water, but practical enough to fit in the majority of bags and backpacks. Is this bottle leak proof? Will it spill in my backpack? Yes. Tried and tested, this bottle is completely leak proof! Make sure you correctly tighten the lid after use, and you will never spill a drop! Is the opening big enough to put ice inside the bottle? Absolutely, your bottle is big enough to fit whole ice cubes inside. However, this bottle gets so cold, so quickly, its doubtful youll even need any! Is the bottle insulated? No. For maximum conductivity, the bottle is made from 100% pure copper. Drinking Water in Copperware (stored for 8 hours or overnight) has following well-known health benefits: 1. Prevents water-born diseases 2. Helps the digestive system to perform well 3. Aids in weight loss 4. Slows down aging 5. Good for cardiovascular health 6. Maintains hemoglobin level 7. Regulates the working of the thyroid glands 8. Stimulates the brain 9. Its anti-inflammatory 10. Fights free radicals Keep water in a copper vessel overnight by your bedside and drink this water first thing in the morning when you wake up. This helps keep your digestive system healthy and will make you feel very refreshed and light everyday. Caution: This bottle is not intended to carry hot water. Carrying hot water in this bottle may cause severe burns.