Parametric Treasure Chest Piggybank

I've had a big pile of quarters on my desk at work for a long time, and what better place to stash them than in this nice little treasure box? The slot on top is sized for a standard quarter.

If you're willing to commit to saving up for a rainy day, print it as a single object, and when it's full you can smash it open. If you'd prefer to keep it re-openable, there are holes in the back and front that are designed to be threaded with zip ties for a semi-permanent seal.

The OpenSCAD file a