5 and I love how they don't spill
583068
Oh my how much my daughter loves there! She is 2.5 and I love how they don't spill!!!
1759376
They are easy to clean,  sturdy, and we haven't noticed any leaks.  My husband loves that he can easily store his pre and post workout all in one bottle. We bought 4 and are very satisfied.
3775470
Here is what I love about these cups:
1. Nesting. They all nest without falling inside each other. All cups nest but on some sets the cups fall inside each other and then the handles stick up and catch the drawer when you try to open it.
2. Made from one piece of molded metal. No welds to break and no plastic/silicone to come off after a year of use.
3. They don't tip over. I hate it when the handle on a measuring cup makes it tip over when it's empty.
I bought these because they looked similar to another set that I have had for years and was very happy with. This set had all the same benefits that I listed above but they are heavier gauge steel so I think they'll hold up even better when the kids get their hands on them. I'd buy these again without hesitation.
2888542
I love these because
1- the lid on these seals extremely well and does not come off accidentally
2- I can send my teenager to school with a healthy meal and since they are microwave safe, he can heat up his food at school.
3- Dishwasher safe so cleaning is easy
4- Cheap enough that don't need to worry about the few that go missing or end up tossing out with the food that sat around too long and too smelly or disgusting to wash the container
5- I have never had a leaking problem

Just ordered my 3rd for the year!
1624556
Love these bottles! They don't spill and are good for kids any age!
3099087
These are so nice and convenient.  They hold things in with no spills!  I will be ordering more in the future!
3807867
I cant express enough how much i love these bottles. they are easy to use, throw in a bad, fall on the floor and never once yet had it leak. Great for kids too.
485174
Contigo has it figured out.  I use this coffee mug and a similarly designed water bottle.  They just do not leak.  I can confidently throw this down on the passenger seat of my car as I get in and know nothing will spill.  And this bronze colored one I got is especially nice (I also have a black one which is great too)
2594389
We're very local to our mason jars! We very often use them for drinking and they're our day to day cups. Even the kids have been using these glasses for years. However, they are still young and we have our fair share of spills on a daily basis. I was never a fan of sippy cups or regular kid type cups so these lids are very welcomed here. I'm also a little nutty about my water. Have you ever seen the movie "Signs"? I have a tendency to be like Bo and always paranoid that there's something wrong with my water. A lid really helps keep that to a minimum so I don't feel like anything has fallen into it!

We don't have a dishwasher so I'm not sure if these would go through the wash okay, but they've been fine being hand washed for the past couple of weeks. I'd prefer not to use plastic straws, but these fit well and have held up very well. All of our stainless and glass straws are too big for the hole so these will suffice for a while.

This set comes with six pieces - two plastic straws, two rings, and two lid tops with holes. These are nice drinking lids and I really don't have any complaints! I did receive these at a discount in exchange for my completely honest review and I hope that it's helpful.
4505212
I love the way they stack and are easy to keep clean- no tiny crevasses. I didn't rate it 5 because I wish they rained better
3397596
They are well made, do not leak, and work as advertised!
1178815
These bottles are constructed well and do not leak. Love that they do not fall over and have a flat bottom.
1161501
This brand of cups keeps coffee hot and does not spill when I am clumsy and careless.  Have bought several as gifts, cups get raves from friends.
2189374
My kids love these water bottles and are the only ones they will use.  One of them lost it at school and I had to replace it with the exact same one immediately as she wouldn't use anything else.  They do not leak after rough use as long as you make sure the spout is closed.  I wash these regularly on the top rack of the dishwasher and they show no wear and leave no residual smell.  They have only been used for water so I don't know about other liquids stored in them.  I like that there are no straws or valves and very little areas where gunk can hide in the top.
809466
I bought two of these at Target and wish I had tried them long ago. My girls chew any straw cups to smithereens and I've been looking for a simpler, straw-free water bottle designed for little ones. After reading reviews that the leak guard was too strong, I just took them out. And even without the guards, barely any water leaks out of these if dropped. Plus, it's only water so who cares if a little leaks. My daughters, 2 and 3, love these cups and have no problems drinking from them. However, I will say again that I read the reviews about how difficult these are to sip from with the leak guards in, so I just took them out. Bada bing - simple, easy to clean, well-built water bottles.
4438818
Doesn't leak, keeps water cold for 12+ hours, and my 5yo's favorite design.  We are very happy!
5115
I'm in love with these cups.  I wish I had tried them sooner - but the $ tag kept me from buying them.  Let me tell you, these are worth it!  There is no valve so they will leak if tipped over, but do not leak one bit when the top is closed.  I love that these don't spew water like other kid straw cups.  They keep water cold for hours and do not sweat all over the inside of my purse/bag.  They are easy to take apart and clean - the straw comes off and the straw mouth piece comes out of the top for easy cleaning.  I'm converting my entire kid cup collection to just these.  LOVE THEM!