Rating: 5 / 5
Interesting. In the book, The Mountaineering Handbook (McGraw-Hill 2005) there's a chapter on lightweight mountaineering and in it a large sidebar devoted to figuring out the best water container, as an example of one lightweight technique. The conclusion is that it's a sports drink bottle. Here's a partial quote of that sidebar:
"Sports drink bottles have other benefits, too: they're widely available and cost a buck or less, plus they come filled with free sugar water. A 20-ounce sports drink bottle is the ideal size for an hour's worth of water, making it easy to keep up with your hydration plan. Breaking down your water into 20-ounce containers makes packing water a little easier; the bottle is ideal for use as a pee bottle; it fits bike bottle and beer can - sized accessories, so many are available, including insulated backpack holders; it gives the mountaineer carrying it a jaunty, dirt-bag appearance; and it's made with PETE, so it doesn't retain flavors, rinses clean easily, and is readily recyclable. You can look at PET or PETE sports drink bottles as the larval form of pile jackets--they recycle into polyester, making them among the most valuable post-consumer waste. Recycling yours from time to time is a very good idea, because you're much more likely to encounter hostile microorganisms that have colonized your water bottle than from drinking untreated mountain runoff. Flexible containers like the Cantene and hydration bladders, though they do lose volume when empty, have lots of cracks and crannies that require vigorous cleaning and strong bleach or TSP treatments to fend off microcritters."
Plus, with their wide mouth it's easy to throw in snow to cool the water in your sports drink bottle.