Ever wonder why some water bottles sweat? Well, when air comes in contact with a cold non-insulated bottle it begins to cool down. If it also cools enough, water vapor in the air is condensed and also turns to liquid that beads up on the outside of the water bottle. With a PrintMagic vacuum insulated bottle, this doesn’t happen. The outside of the water bottle just doesn’t get cold enough, And by keeping water rings off your table or unique contents of your bag from getting wet with bottle sweat.