Plastic funnel with 2" spout. Specify 30- or 55-gallon drum size. Funnels have a flat area on the bottom above the spout to prevent them from slipping to the side in the barrel and becoming misaligned. Color may vary, they may be green, black, or blue.
30 gallon: 18" diameter, 7" overall depth
55 gallon: 22.25" diameter, 8" overall depth