The Can-O-Worms composting system is a well made stack-able tray worm composter. It is made out of sturdy thick black plastic and all the pieces fit together well. It comes with a very complete and informative set of instructions. Can O Worms Instructions The lid is extremely tight fitting and worms are very unlikely to escape. The Base is well designed and includes a tap to drain off any excess liquids.
The manufacturer did a great job thinking the system out. They included everything you need to vermicompost with the Can-O-Worms except the worms. They send you knowledge, bedding, the bin and even thought to have the packaging double as a temporary cover for the tray holes on the first level.
As I have often stated, worms do not need a mansion to live in, however if you are serious about vermicomposting and want a high quality composter system for your worms to produce lots of high quality vermicompost, then this is the system for you.