I bought this as an unbottle, as my old 70 ounce reservoir constantly left a nasty plastic taste. I bought into the marketing hype of the new gear in hopes that they told the truth. Well, perhaps the reservoir itself doesn't emit any plastic taste, but I think this tube kit does. I need to swap the tube with the uninsulated tube to find out for sure. But, besides this, the tube came undone from the reservoir (I had it pushed as far as it could go, just like the stock tube). Thankfully this happened in the house after my outing. But, I was not pleased to get a sudden burst of water everywhere. And, as far as its insulation qualities...while it probably did help some, every sip I took started out with a nice rush of warm/hot water. And, the rubber/plastic cap was very cumbersome to use. As mentioned earlier, it will not fit through CamelBak's shoulder "loops". You would have to feed the tube through the loop first, then attach it to the reservoir, then fill it. That's not convenient if you like to freeze some water overnight first. For me, it's not worth the $16. Use that money towards a cleaning kit.

I haven't used the cleaning tablets yet, but the new plastic pieces to help dry the reservoir are designed much better than what I had before (some sort of foldable plastic tree that fit inside; also made by CamelBak). The tube brush does the job, although it can be a little challenging to push the brush all the way to the end. I still can't get the tube to dry on the inside, especially when keeping it attached to the reservoir, as pictured in the instructions for this cleaning kit.