Seattle Sports H2Duo Two-Part Bottle Screw-off upper half, the H2Duo lets you add ice cubes and clean it easily (most stainless bottles have a small, narrow opening). You can use the top or bottom pieces to drink from. Comes with a grey silicone band that can be fitted over the top or bottom part of the bottle for a more comfortable drinking surface. Our screw cap features flow-through threads that allow you to pour from the loosened cap Includes a convenient cap lanyard, so you dont easily lose the great cap for this great bottle.