Brio compatible barrel cargo adapter

My son loves creating railways, however his are not ordered relaxing journeys. His are filled with confusion, delay, derailments and utter chaos. I created the leaky barrel set as decorative pieces for his railway, however he very soon wanted them on trains. This adapter allows the leaky barrels to be transported on the brio standard freight car.

 This print profile includes the adapter and the plain barrel. More imaginative / hazardous barrels are part of the leaky set pictured below.