Saw my friends using these bottle and never bothered but after I tried these, now I was wondering what took me so long to try these before...
I've always wanted this kind of bottle. First, I wanted to buy Camelbak, but they don't have a cover for the mouthpiece which is super inconvenient because germs might go on there. Contigo's mouthpiece does have a cover, and it can be used by pushing the white oval bottom. I haven't experienced a leak before. Hopefully, I will never. I've only pour cold liquid in here. It doesn't stay cool just letting you know.
IMPORTANT! I do want to recommend this product to people who doesn't drink a lot of water. I like to drink water, but sometimes I would forget because you have to twist the cap, tilt it up, and drink it. With this bottle, you can simply put it in front of you between your arms when you are using the computer or watch a movie. You won't even notice when you have already finished 24 oz. of water. You will just keep sipping the water until it's empty and fill it up for another bottle. It's a motivation! :D
I have been buying this type of water bottle for about a year. I like that you don't have to tip the bottle and it doesn't leak. If you clean them often they don't mold.