2 quart bladder canteen,
2 Quart Canteen With Cover
The USGI 2 quart canteen is a popular option since it weighs very little empty and rides easily while giving it's owner the ability to carry an extra 2 quarts of water when needed for a mission. These are frequently carried on the upper webbing loops on the ALICE Packor it can be carried by a sling as well.
2 Quart Canteen Mounted to the Side of a Large ALICE Pack