I've used the sawyer mini and sawyer squeeze for several years. I've had two bags break, both while filtering. I use the quart size and always carry a spare. On a long trip I might take a third for a spare, they don't weigh much. For as much as they're used, I don't think 2 busted one over several years is too bad. The squeeze is worth the extra grams over the mini IMHO. BTW, I tried a soft water bottle once, dropped it into some mulch as I was getting out of my car and punctured it. I'll stick with the bulletproof Nalgene, much easier to drink out of too.
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