The Cogas Puzzle is a machined puzzle made of brass and aluminum(plus a few other metal components). Measuring almost 3 inches tall and almost 1.5 inches in diameter.
I wanted to create a puzzle that could potentially be useful. In other words, a puzzle that you can put things in. In this case it would be small things. When I started designing this puzzle I wanted it to resemble a medicine bottle to pay homage to one of the greatest accidental puzzles of all time.
Remove the brass lid
No forcing, prying, or outside tools needed
You may find that a bit of dexterity is needed
(there are a few small pieces so keep that in mind, especially if small children are handling the puzzle)