The hydration pack’s materials will determine how rugged and long-lasting the product will be. Most water packs are built to take some abuse, but there are also other water bladder packs found on the market that are built to last a lifetime. The more resilient types of hydration reservoirs that come with features like welded seems do typically cost more, but can also last for an incredible amount of time, and do tend to save you money in the long run.
Also, having it that you know can withstand just about anything means you won’t find yourself in the middle of outdoor activity with a bladder that breaks or malfunctions, leaving you with no water. So, reliability is a key factor, and something you’ll be grateful for later.