Question

Question:
I know two people: one is already in the world that is wholly good [I hope], and the other is still with us.
For decades, their custom has been to exchange a stinky liqueur as mishloach manot between the two of them.
The mother-in-law made homemade liqueur one year and distributed it to everyone in her mishloach manot packages.
Her son-in-law received it, tasted it, and declared that it tasted like something they do not bring into the Temple courtyard out of respect…
But he kept it for a year, and the next year he gave his mother-in-law a package containing that same “stinky liqueur.”
She also kept it for a year and gave it back to him in her mishloach manot…
And so every year they were careful to exchange it between them.
 
Have they fulfilled the obligation of mishloach manot with a drink that both of them find disgusting? [And maybe are even offended by, and use to offend one another?] Perhaps not, because it is not fit for human consumption? [Maybe in pressing circumstances it would be?]
Or on Purim is this considered reasonable and accepted, and they do fulfill the obligation this way, because that is part of the spirit of the day?
[Something like “Purim Torah” being fully legitimate, and one fulfills the obligation of Torah study with it on Purim? [“And you shall meditate on it day and night”—at least for a king…]]
 
I would be happy to hear the honored Rabbi’s answer.
Presumably this has practical implications for many cases as to whether one may send all kinds of joke foods… [for example, hamantaschen filled with spicy schug, or cherry tomatoes coated in fine chocolate…] And do people really fulfill the obligation with that?