Thanks to the high-quality AeroLight technology, the IceFlow Twist Flip Bottle is 33 % lighter than conventional stainless steel bottles. The feather-light insulation ensures that your water stays ice-cold for hours. The stainless steel carrying hook makes it easy to grab the bottle and head out. The lid can be opened with a twist of the outer ring. The twist flip lid locks and unlocks, and the Flow Steady regulator lets you adjust the flow rate of your 24-ounce drink. When you're done, flip the lid back closed and lock it to protect your sipping space.