Great replacement for annoying sports top
I bought this to replace the extremely annoying sports top. I only got a trickle of water with the old top. It got covered with lip balm, too, or in civilized society, lipstick. ewwww

This top is secure and unscrews completely so I can just pour in the water. If you are prone to losing things, you might want to spring for the leash device, too, but I like that I don't have anything smacking me in the face when I drink.

Great top to a Great Bottle
This is an excellent addition to the sport top. Great ffor taking in the car or connecting to a bag.

Super Nice Screw Tops
All, Ignore the viewer who gave one star due to having to unscrew the top. Its fast to take the top of, plus it's good exercise for your fingers. I threw away all the other tops, they leaked or like another viewer said they don't give a good stream to drink. The bottles are so light, you don't have to worry about breaking them either. They never leak, shake them up and down, nothing comes out. I have about ten of these bottles to last me through a week. I have different designs and different sizes and love them all. You'll love them!

Horrible bottle cap!
I only gave this water cap one star because if you can't drink easily from it-why have it? This screw off style cap is cumbersome and takes a total of SEVEN turns to get the cap off. Who has the time or patience when looking for a quick drink? I looked online to purchase another style cap but also found problem reviews for the other style caps. Save the $25 and look elsewhere.

Secure, but annoying to pen
The sports cap top just wasn't cutting it for my needs. It only releases a small stream of water and was horrible for the gym. Apparently, I also seemed to have lost my sucking abilities during my growing up years because I just couldn't get more water to come out at all.

So I brought this top. I love that it has a finger loop on top so that it's easy to carry around. And it's definitely very very secure. So secure in fact that it takes several turns to get the bottle open. I'm finding that this is annoying me also. When I want my water, I want it fast. While Siggs are so pretty and healthy for you, I have found that I have gone back to the plastic bottled water bottles for gym, because they hold a lot of water and the unscrewing is really quick.