I brought three different hydration packs because I just started hiking and wanted to make sure everyone in my group had one. Suffice it to say I was disappointed because this one costs about the same as the others, but it doesn't come with a bladder (the thing that holds water) which made it pretty much useless. They cost $15-$20 individually, making them by far the most expensive of the bunch, and I don't see anything special about them that would justify the price. I am only deducting one star for this because it is clear in the title and description that there is no bubble. I just skipped it or took it for granted thinking they were standard. However, I swapped out the bladder on one of the others so I could try that one. It keeps water cold for hours and is comfortable. If you already have a bladder or want some sort of special bladder (is that a thing?), this is a good choice. If you're hoping to use it right away, you'll be disappointed.
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