food grade 304 stainless steel round lunch box multi-layer insulated bucket student office worker portable lunch box suit customization 食品级304不锈钢圆形饭盒多层保温桶学生上班族便携餐盒套装定制

single-layer stainless steel [type b]] double-layer stainless steel [type b]] three-layer stainless steel [type b]] single-layer stainless steel [type a]] double-layer stainless steel [type a]] three-layer stainless steel [type a]] four-layer stainless steel [type a]]

blue green purple red