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This is a very convienent, and useful water bottle sleeve. It keeps the bottle that you put inside cold, even in extremely hot Temps: I live near Phoenix, AZ., I had the sleeve around my water bottle, and inside my car, for 30 mins, and it was 109 degrees outside, and the water kept cold. It has a cinching cord in the top, to wrap and secure around the water bottle keeping it in place. There is a belt loop, and a clip, to attach it to a belt. I bought a double clip key holder, and attached it where the clip on it is, so I can hook it to a shopping cart, day pack, or gym bag.

A regular size (16.9 oz.) water bottle will just BARELY squeeze into this thing. It's just too small for general use. Also, the sock is pretty thin. I doubt if it would do much at insulating. It's 2-3/8"X6" (inside), has a plastic spring hook & place in the strap on one side for a belt to slip through. I can't figure out what the draw string is for. Once the bottle is squeezed in, it's not going anywhere. But it's there in case you have a very small drink I guess. For me, just something to snag on stuff.

Years ago I was able to purchase this product at Walmart and Walgreens for a fraction of the price. I love these bottle holders but would keep leaving my water bottle at different places and when I went back it was gone. Obviously other people also liked them because they stole them. This is the best water bottle holder; it has a drawstring to hold different shape bottles (some are wider than others, etc.) and has a clip to attach to a purse or backpack. I only gave it 4 stars because I believe the price should be less than what it is.

I bought 2 neoprene bottle insulators back in 2005 at Walmart, one for me and one for my daughter, and I loved it!! Unfortunately, I lost mine at Disney World in 2013. (I actually believe somebody took it off my bottle because there's no way it fell off.) I found this one on Amazon.com and ordered it. Although the material is the same, and it keeps my water cold, it is a bit smaller and it doesn't seem to be sewn as well as the one from Walmart. I use it almost every day and will buy another one in a different color to keep as a back-up, 'cause you never know. I only buy 16.9 fl. oz bottles and they fit snugly - not sure a 20 oz bottle will fit in it, which will be a problem when I next travel to Disney World.

I bought this case to keep my water cold. I freeze my water so it stays cold throughout the night. Putting the water bottle in the cooler guarantees that it stays very cold. My only problem and why I gave it four stars is that it gets wet on the bottom so I need to put a coaster under it otherwise the furniture gets a water stain. Other than that plus it comes in nice colors.

I look for several years to find this size of insulator that fits a bottle of tea. I bought 4 of them in different colors. They keep the tea cold, the bottle from breaking, and have a long string handle that helps when my arms and hands are full of other stuff. All the colors are beautiful.

I had owned an identical bottle cover purchased years ago. When I wanted to replace it I couldn't find the same one. All the ones I found were "shaped" for a water bottle, tapering at the top. This one is perfect for me. I insert a glass water bottle that I wash and refill. The cover is a little bigger in diameter than the bottle but the drawstring and cord-lock system keep the cover on the bottle as I lift it up to use it.

Plus: nice size, fits 16 or 20 oz bottled water perfectly, belt loop and snap hook. Minus: very little insulating capability, cold drinks get warm quickly.