These are really great cups!! First of all they are just super cute for kids. The colors are vibrant and the material is very durable. The lid has a little lock mechanism that will help with spills. I can see my grandkids using these for a long time and feel confident that these will hold up to the numerous drops, rolls and throws the boys will put them though. In addition, the Sonic design is their favorite!!

My daughters got the hello kitty design of these water bottles and I don’t think I’ve ever seen kids so excited about water bottles. They’re large enough and perfect size for a child (mine are 4 and 6). They’re super cute in design and quality wise they’re great. The spill proof design is also great for us parents. I love these

Wow, wow, wow! These stainless steel water bottle set is the real deal. My son is in love with the Spider-Man one. Super easy to clean up and it even has a carry handle on it making easy for my son to grab. Love that it has a lock feature to prevent it from opening accidentally and spilling water everywhere. Definitely recommend.

Requested this item for my grandson going into his first year of full days at school. These were bigger than expected which is good. Love the locking lids to keep from spilling however wish they were spill proof with the lid open as well. Cute designs and love that they are sweat proof. Great quality and overall happy.

My son really enjoyed the Minecraft water bottle! He's obsessed this is the first time he's actually keeping up with the bottle! taking care of it, his Minecraft obsession doesn't hurt and he hasn't lost it yet!! lol I love the spill proof lid since he is kind of a clutz at times prevents me from having wet backpacks at the end of the day it's easy to use lock and unlock my child picked it up quick it's the little touches for me like the silicone rubber at the bottom I have glass on my table so it's perfect preventing accidents my only con is it's not rated for hot liquids but I think that's just because of the design of the lid. The double insulation did keep drinks cold all day though that's always a plus

These Zak cups are SO cute and sturdy. They’re going to be great for my daughter for school and traveling. The lid is great, it can be easily locked and unlocked so that there’s no spills at all. It definitely keeps drinks cold for a while! The fact that it’s a straw system too is something my daughter loves. I would definitely recommend these. We got the Hello Kitty designs and they’re adorable!

Zak! design stainless steel water bottle pack is great for children of all ages. First, the bottles are much larger than most of the children’s bottles - 20 oz. It’s especially helpful for older kids and for hot days. Second, the bottles keep water cold all day. We went to a rather hot day at a fair (85 + F), and the water was still crisp and cool after several hours in the sun. Third, the handle is very useful for carrying the bottle around as well as a locking mechanism on the lid that makes it spill proof. Overall, these bottles are very well designed to provide all day hydration and have cool designs that kids like.

My son loves these water bottles. He is a big fan of sonic so we ordered him sonic bottles. They are so well made and easy to carry around. They have kept the water cold for a while even in this hot summer heat. The lock on the top really help keeping his backpack dry so it does not accidentally open in his bag.

These bottles seem pretty solid and time will tell after being used for about a month with my 7 and 8 year olds. They've dropped them many times and a few scuffs only. Zak is a known brand for reason. These vottles are perfect size for the age and plenty of room to keep them hydrated while at school. It says 3+ but they seem a bit big for a 3 y/o in my opinion. These are meant for cold liquids only. They keep drinks cold for half day at room temp in my application. Perfect for back to school.

The Zak Designs 20 oz stainless steel double wall kids straw bottle is the perfect back to school water bottle. The double wall design makes these bottles extra tough and keeps the water cool all day long during school. The 20 oz size is nice so the kids don't run out of water. There is a lock on the lid as well! My kids love them and since it is a 2-pack there is minimal fighting over the bottles! My kids chose the Hello Kitty design and we like the fact that they have 2 different patterns on them so we can tell them apart.