Steel Self-Dumping Hoppers (HOP) - Product Family Page - Vestil
...Must be attached to fork truck when dumping. All welded steel self-dumping Hopper handles bulk materials and scrap easily. Must transport and dump with a forklift or make the unit mobile with the optional casters. Self dumping hoppers are engineered to dump when the safety latch is tripped and to return to an upright locked position when empty....
https://www.vestil.com/product.php?FID=460
Self Dumping Hoppers - Hippo Hopper
...The Hippo Hopper is a commercial product line consisting of self-dumping hoppers and specialty metal containers exclusively manufactured by FabCorp, Inc. of Houston, Texas....
https://www.hippohopper.com/