What is the material of Vislan thermos pot?

the material is 34 stainless steel inside and outside. WISSBLUE comes from Switzerland, which has the reputation of "a country of thousands of lakes". It is an outdoor leisure brand specially tailored for modern urbanites. At the beginning of its establishment, it defined outdoor as "relaxing outdoor" and "sharing outdoor" suitable for most people in the city. Wissblue stands for freedom, relaxation, sharing and happiness outdoors. It can make urban people enjoy the happiness brought by outdoor leisure time after work pressure. It aims to provide outing equipment, picnic camping equipment, cycling equipment, fishing equipment, mountaineering equipment, etc. for urban people's daily outdoor leisure, weekend outing, small holiday outing and outdoor life in go on road trip. The product portfolio of the equipment can fully meet every outdoor theme life, and it is convenient to carry and easy to use.