I bought a high sierra "camelbak" type water pack for $25. I actually told someone I got it for a steal at $30 because I forgot what it cost. By the time my girlfriend went back they were gone - same thing at Amazon was over $40.

While I hate that you basically have to make an on-the-spot decision, they absolutely crush it on quality and price 9 times out of 10.

https://www.amazon.com/High-Sierra-Visalia-Hydration-Backpac...

http://www.costcoweekender.com/2016/03/high-sierra-visalia-9...