Coffee Loaders - AAE scale hoppers are the smarter way to weigh and convey! First, you can weigh your coffee with an accuracy of 0.05 pounds. Second, you can convey your coffee to its destination with a vacuum loader. Scale hoppers are made from easy-to-clean food-grade polyethylene and are portable with four locking casters. Includes integrated spill guard. No more tipping brute containers.