I'm guessing that the composer here is Frans Geysen, who wrote "Op de fles" for recorder (http://www.cebedem.be/composers/geysen_frans/en.html)?

If this is the case then the pun arises through the fact that the piece of music has been / can be played on "tuned bottles" (i.e. "op de fles" / "on a bottle", e.g. http://www.flanders-recorder-quartet.be/multi050302.pdf (notably by a group called "Vier op 'n rij" - or lit. four in a row, four lined up, aka, the Flanders' Recorder Ensemble), as well as referring to "bankruptcy". (There are is also the literal translation of in/on the bottle).

The trick is conveying this double meaning in English, because as has already been said - to "go broke" / "bankrupt", etc. has no meaning other than just that, i.e. you've lost your business, money, etc., etc.

Perhaps the closest approximation is "hit the bottle" - in the sense of I'm going to drink a lot (!) or literally strike the object. It doesn't cover the Dutch sense of bankruptcy precisely, although impending bankruptcy might very well lead you to hit the bottle!

It's also interesting to look at the origins of "op de fles" (http://www.onzetaal.nl/advies/fles.php), in particular the potentially different Dutch/Flemish derivations (Geysen was educated in Belgium). The former referring to the dreg ends of a barrel of ale, the latter to the bottle used to nurse the dying (a sense of "here today, gone tomorrow", perhaps?)

My suggestion would be: "Op de fles" - "Hit the bottle" .... "a case of here today, gone tomorrow.."