The material is 304 stainless steel inside and outside. WISSBLUE comes from Switzerland, which has the reputation of "the 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 outdoor freedom, relaxation, sharing and happiness. It can make urbanites enjoy the happiness brought by outdoor leisure time after work pressure. It aims to provide outing equipment, picnic camping equipment, cycling equipment, fishing equipment and mountaineering equipment. Suitable for urban people's daily outdoor leisure, weekend outing, small holiday outing and go on road trip in outdoor life. The product combination of the equipment can completely meet every outdoor theme life, which is convenient to carry and easy to use.