I have 4 kids ranging in age from 15 to 3. From the oldest to the youngest these cups are a BIG hit. Not only do they love these cups, but I have not seen a sippy cup spill or regular cup spill since we brought these cups into our home. I even plan on letting the school aged kids pack them in their lunch boxes.

They are much safer to use, because of what they are made of. The plastic cups I used to use contained a chemical called Bisphenol-a (this chemical is also contained in the plastic used to make a lot of baby bottles). I was sickened and wanted an alternative. I researched for a long time online, and came to the conclusion that these cups were the best option for us.

Kleen Kanteen was an alternate choice, but #1-they are made in China, and #2-they do not have the water soluble lining that the SIGG does(you do not taste aluminum this way).

Also, cleaning these is a breeze, you just use hot water. We have used apple juice, water, milk, chocolate milk, grape juice etc. and no leaks!

I JUST LOVE THESE CUPS AND WOULD HIGHLY RECOMMEND THEM FOR ANY CHILD THAT HAS THE ABILITY TO TWIST THE CAP OPEN AND SHUT. MY 3 YEAR OLD HAS NOT MASTERED THAT YET, SO I WOULD SAY AGE 4 IS MORE APPROPRIATE. 5 stars

We bought a Sigg bottle and a similar one made by Thermos for our child. I like the spout of the sigg bottle better than the built in straw in the Thermos bottle. However, the Sigg bottle conducts the temperatures through to the outside of the bottle (the Thermos one does not). Thus, if we fill it with ice water, the bottle is freezing cold to hold and 'sweats'. If filled with a hot drink the bottle gets hot to the touch. The Thermos bottle seems to have a level of insulation between the inner wall and the outside of the bottle- thus making it much more comfortable for a child to work with. Also, our child had a little trouble with the twisting open/shut of the spout on this bottle and tended to just leave it open, which does lead to leaking..... 3 stars

I was very hesitant to get these because of the price, but I'm glad I tried it. I'm so happy to find a safe water bottle-- and it DOESN'T LEAK in the lunch box! My 4 and 7 yr olds use these without assistance. The twist-to-open spout was a bit stiff at first, but they can open them easily now. A younger child might have trouble with that type of twist spout without help. The only complaint is the bottle gets really cold, so some sort of holder is helpful. I would definitely buy these again, and hope to get one for myself soon! 5 stars

I love this water bottle! I feel good that my kids drink out of a non plastic bottle. I like that there is a lining in it so that you can put juice in it. I wish it could go in the dishwasher, but I read that was not recommended. The lid that goes over the sippy part is kind of annoying for the baby but you can take that off. 5 stars

I ordered this bottle for my 1 year old daughter. I wanted something that was not made out of the unsafe plastic, which it is. The drinking spout was too hard for her to open, but if I left it open for her, it was NOT leak-proof at all. So, I ended up ordering myself a Sigg bottle with a different spout (that I switched with hers) that was leak-proof & only had to be pushed in a little with the mouth to drink, which she can do just fine. Another thing is that I did not realize that it would dent so easily when dropped. If you have kids, you know that they drop things A LOT! So this bottle is pretty dented up by now, but still very usable anyway. It is a good bottle for a little older kids though. 3 stars