Stainless steel thermos flask. Make from 18-8 S/S inside and 18-8 or 201 S/S outside, vacuum. capacity:350ml, 500ml, 750ml, 100 SEB bottles have passed CE and FDA test,also BPA Free,Lead Free and Paint safe approved. 1).Various styles and colors are available. 2).Stylish looking customers' design is highly welcomed.3).Logo and models can be customized according to requirement.