This is the canteen long issued to British troops and adopted by Bear Grylls for use on his show, “Man vs.Wild”. While I am a big fan of hydration bladders there is certainly something to be said for a canteen and cup combination. For example, you can boil water to purify it or to prepare a warm drink or for cooking purposes.
The Crusader Canteen Cooking System from BCB International consists of a 58 pattern canteen and plastic mug as well as a cooker and metal mug with lid to help water boil faster, which all nestle together to fit into a 90-pattern water pouch. You can cook with clean, smokeless and odorless heat from a gel or block fuel to boil 1 pint of water in eight minutes.