Another disposable water bottles hack: I use them in conjunction with a water bladder:

1. As a measuring cup to refill the bladder. Each bottle full is normally 0.5l.

2. It's often easier to get a bottle into a small sink than it is a bladder.

3. It's more convenient to refill a bladder using a bottle than it is to remove the bladder from my pack, then put it back in.

4. As an emergency reserve.There's no way to tell how much water is left in a bladder until it's empty. I carry a filled 0.5L bottle (or two) just in case.


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