Nalgene

I bought this addition for my nalgene bottle mainly because during my research a few people complained that it was difficult to drink from the mouth of the bottle without spilling the contents down your chin. Well this device definitely stops that and fits the bottle perfectly. However, since receiving the bottle I've not experienced any problems without using the easy sipper, but now I've bought it I use it because it wasn't cheap to buy.

A simple product, done well. Means that Ice cubes in the nalgene don't disrupt the water flow. Also prevents splashing whilst drinking on the move/whilst being active!

A Must have with these wide-mouth bottles. As other reviews had said, should be a thing included with the bottle, or at a lower cost.Fits easy into the mouth of the bottle and fits quite snug, however it does not permanently attach to the bottle, its just sits (quite securely though) in place. Personally i put this in upside down as it find water doesnt drip out to the side as much. Also a tip to people buying this, when drinking or pouring out, the water tends to 'glug', so i drilled a small air hole at the top to allow air to pass through, works a whole lot better now, and i have noticed some aftermarket sippers have this hole also.

Works perfectly, don't get the reviews saying it doesn't fit.You don't need to push it all the way through, sit it at the lip and then close the lid. The lid pushes it as far as it needs to go.If you're constantly dealing with it popping into the bottle, you're pushing it too far in.

Just sits in the top of your bottle to prevent your bottle from just tipping water on your face

Good accessory.Does what it says -makes it easier to drink from wide mouth bottle.I use it with the 1.5 l bottle.

Not the best it could be honestly."It fits snugly into the neck of the bottle" - I found this not to be the case with my bottles. I own two wide mouth 1L bottles and in one it fits ok (not as snugly as in some pics/videos I have seen) and in the other it's just too loose, so much that even if I place it at an angle close the lid and shake the bottle it will become loose into the water.If mine was new I would probably try to avoid exposing it to cold/hot temperatures (don't know if that can influence the size of the slipper).I bought this so I could drink while in a vehicle or while walking and not spill half of it into myself. On the bottle that it fits it does work well and the flow is good. But in my opinion it is waaay too expensive (I could almost buy a new 1L nalgene bottle for this price where I live in).I would advise you to look into the capcap (I think it's by humangear) as an alternative. I don't have one but it will be my choice next time.Hope this was helpful.

I love the Nalgene bottles but the opening is just too big - normally end up with water down me. This stopper is just great.If you are buying a Nalgene bottle buy at least 1 of these