1.Material: inside 304 stainless steel; outside 201 stainless steel.
2.Insulation performance: 6-12 hours.
3.Features: leak-poof design portable put onto the bag tightly fitted lid prevents the inside liquid from leaking it is recommended into the bag and suitable for office home travel use.6.Others: fresh brief healthy easy to carry and mini size (300ml) and light weight (300g) sweet shape for babies or girls.