Stew said:
If I had a survival tin I wouldn't bother with a condom. Presuming you've got it with you to collect/carry water, it's far too much hassle.
I would prefer to carry a freezer bag or something similar.
I wholeheartedly agree... Those condoms are great to avoid catching something odd when you least expect it, but for catching water they're almost useless... unless you have a deep and large pond you can scoop energically from. They do require some decent lot of energy to expand and hold the water. It's not impossible, but it's hard, and if you miss on the first try, you'll disturb the mud on the bottom and you'll have to wait forever for the next attempt.
Freezer bags offer the advantage of being easy to fill.
Right now I'm carrying an old platypud hydration bladder. I removed the tube and stuck a cork in the elbow-like piece where the tube attaches. It doesn't leaks at all, and it allows me to safely carry 3 liters of easily filled water in a backpack. Rolled tight, it hardly takes up more space than 2-3 gallon-sized ziplocs. It's small enough to fit in the chest pocket of a bush shirt.
Those ziplocks are great to collect water and to treat it, but they bust when you least expect it (just ask my father, the condoms are the same
). Having a gallon of water splashing the inside of your pack (not mentioning anything like freezing temps...) is not a funny experience. I still carry a few zippies as a backup water container set, and to gather plants, and stuff (in the bush, any container = priceless!). I also use them as a trash bag, so I can bring back the trash I and preceding humans have produced, and to waterproof most of my gear.
Cheers,
David