Material: 18/8 stainless steel 304+ABS resin

Capacity:350ml

weight: 220g

Packing: cloth bag &gift box, 7*7*23cm

After many times of test, the heat preservation time is approx 16 hours, 100℃ hot water still keep approx 30℃ after 16 hours when the botter under the room tempreture is 23℃  

And the cold insulation test, room tempreture is 23℃, 0℃ cold water to 3℃ need 6 hous, 12 hours to 10℃, and 24 hours is 16℃.