I bought this Zebra stainless steel water container for my daughter two (2) years ago. She practically spent 7 to 8 hours in school including her travel time back and forth. I preferred a water container for her that can hold the coldness of her water for several hours. Ordinary students' water containers or tumblers usually do not keep the water for long so I decided to check the home and appliance center of a certain mall. I found this stainless steel water container that can hold the hotness and coldness of its content. The mouth is made from hard and durable plastic material that perfectly works in avoiding water from spilling. On top of the mouth is a small stainless steel piece use to cover the small basin of the mouth and the space can be used as little compartment for candies. The body is 100% stainless steel too and the inside I don't know exactly what is made of but it performs great. It can be easily open and close.
With that kind of container I know my daughter has no need to buy cold water in the canteen or even juices to quench her thirst.