Excellent addition to our Rubbermaid 20 gallon Feed and Seed container.  We use the container to hold chicken feed for our backyard chickens and the wheeled dolly makes it so much easier to move around our work areas.  It's convenient to roll it right into the kitchen to mix up batches of feed (usually mix of 50 pounds cracked corn and 50 pounds of scratch, now a mix of Layena crumbles, probiotics, etc to help with molting).  Even with 100 pounds of feed in the container, it is easy for either me or my wife to move.  The twist locking base also prevents the container from tipping or falling off the dolly.  The dolly is also wide enough with the 5 wheels to be very stable even with a full can of feed.  It works so well, we're going to get a second container and dolly for dog food.