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“Drying Gummy Bears Reduce Anti-Matter Lifetime” has attracted some attention in 2014.
See TUM press releases:
> https://www.frm2.tum.de/en/frm2/news-media/press/news/news/article/how-long-do-antiparticles-live-in-gummy-bears
> https://www.ph.tum.de/latest/news/gummy-bears
> and the summary of the experiment.

Our amazing study was nominated for (unfortunately not yet awarded with) the IG Nobel Prize, see the website of improbable research.
The (serious) scientific outcome is published in the Journal of Physical Chemistry B. In particular, we present a concise summary of the correlation between the Positronium lifetime and the mean size of pores in the (sub-)nanometer range (see Appendix of the paper).