preemo - 14 inch Glycerin Cooler Bong TopThe Preemo 14 inch Glycerine Cooler Bong Top is a bong attachment that's designed to cool your smoke and give you the smoothest hits possible. The tube is filled with glycerin, a substance that can be frozen to cool down the smoke as it passes through, providing a smoother and more enjoyable smoking experience. The release cap allows for easy cleaning and maintenance. It has a joint size of 45mm and a tube diameter of 50mm, making it a substantial