BULK TECH, INC. OFFERS A WIDE SELECTION OF PLASTIC & WELDED STEEL HOPPER BOTTOM BINS. Our smooth-walled bins have a heavy-duty design which exceeds engineering specifications. With storage tanks, the most important factor of determining longevity is the quality of its coating finish. That's why Bulk Tech ensures a top quality surface preparation for our industrial coatings to adhere to. The result is a bin and a finish that does its job, year after year–just like you do.