So one liter of water is 35.28 ounces (2.205 lb). Mind you this is just the water. Then you factor in that a Platypus weighs .8oz (.05 lb) and you have 36.08 ounces or 2.25500 pounds. This is just for one platypus, say you would like to carry three liters. Thats 6.765 pounds… If you have the equivalent amount of water in your three liter camelback (7.5 oz) you weigh in at 8.0025 oz (zheesh). Don’t get me wrong camelbacks are great, but I’m reconsidering if it is the “best” solution. Looking into the matter I’ve found that the 3 liter Omega Reservoir from camelback has a platypus & nalgene twin. The platypus’ online page states that it weighs a cool 3.8 oz for the Hoser and 5.8 for the Big Zip. I couldn’t find a weight on the nalgene, yet it looked like a bulky version of the camelback. I’m going to try and see if I can get a couple friends to play with my camelback, and give some nice stats in the end…