Two things emerge:
1. The research was *not* actually on the ISS. It was on a research airplane. So, it's a little less difficult than I thought it was.
2. The article implies -- but does not explain exactly how -- Nestle was intending to benefit in the production of Earthbound foamy products, by studying them in microgravity.
In conclusion, it's not as weird as it seemed from reading TFA. Kinda weird, though. Sounds almost like Nestle food scientists managed to boondoggle a ride on the "vomit comet" airplane.