flexible tank made of 4 layers PE+1layer PP typevalve sizevavle numbertop/top discharging2&3 inch1top/bottom discharging2&3 inch2bottom/bottom discharging2&3 inch1 Advantage: . Low cost . Clean and Green, No risk of contamination . Can carry 40% or more cargo than drum and 50%or more than bottles . Quick loading compared with drums and IBCs and No return needed . Reduce labor cost