Review on humangear capCAP+: The Ultimate Blue Bottle Cap for All Your Hydration Needs by Shane Schobinger

4 stars for the price (it costs the same as my bottle of Nalgen). I had an earlier version of this cover and it was fantastic. When the bottle was stolen I bought a newer version of the cap and was not disappointed. Small improvements are noticeable, ie. Silicone pads and a hook to keep the lid from hitting your face. And the cap was expensive (the cost of the bottle itself), the added functionality was worth it. You can't go wrong with 32 ounces of Nalgene and Capcap+.