Taking the big chugs now!
The wide mouth of the 32oz Nalgene bottles can sometimes be a pain. Needing to take a big chug? Well good luck to you as a third of it will likely end up on either side of your face and down your front. With this little addition, it keeps it all together for easy drinking.
The insert itself looks small and you may wonder if it will even fit or will it just fall in. Well good news for all, it fits just fine. It is secure enough without it being stuck and unable to remove it. A very clever addition and worth the money.