I've had a SIGG bottle for just over a year now and absolutely love it. I recommend them to everyone. They are lightweight and easy to clean with the SIGG "bottle clean" tablets, but you can also just clean them with soap and water. The aluminum leaves no weird taste in the water (unless you leave water in the bottle for a really long time, but that will happen in any water bottle). SIGG bottles are environmentally friendly, too--when you don't want it anymore, just throw it in the recycling as you would an aluminum can. The sport top can take a little getting used to since you have to kind of push it in with your lips in kind of a funny way, but I use mine all the time and love it. (My boyfriend doesn't like it, so he has a regular cap for his SIGG.) You can also just unscrew the sport cap to take a drink, if you prefer. Some stores sell the regular caps, which have a circular top so you could attach the bottle to a backpack or other gear. I really like the .6L size and find that it is perfect for throwing in my gym bag or keeping at my desk, but some like a larger or smaller size. (SIGG bottles come in a .3 and .4L size for kids, too!) SIGGs come in a whole slew of patterns, colors and sizes, so you can find one that is just right for your style. These make a great present for an athlete or outdoorsperson, or for someone who just really likes water and the environment! 5 stars

It's a solid design and nice color, but mine has a dent on the bottom of the bottle. Also, it's hard to get the last bit of water out of the container and into your mouth. 4 stars

Love these, great designs, NOT PLASTIC, lightweight, cool drinking mechanism. Bought one for each of us. 5 stars

I cannot recommend this item as the top is pretty much poorly designed fancy garbage. It is not at all suitable for this type of bottle, but would work fine on a squeezable bottle. It takes a significant amount of pressure to hold the dispenser in the open position. Once in the open position, the water trickles out at VERY slow rate. To get the water faster you would need to suck on the bottle which looks quite foolish, but is also ineffiecient as there's no vent to release the vacuum you create. I just remove the entire top to drink. No issues with the bottle itself but I should have gotten the loop top. 2 stars

These are a nice alternative to buying bottled water. But I don't like the sports top because it is hard to drink from. The aluminum finish streaked in the dishwasher. Don't know why that color and not the others (red, black) was affected. And they all dent easily. Even so, I'm glad I purchased them and plan on getting different bottle tops. 3 stars