It is great that you have learned lots of ways to DIY, are having fun, and are even sharing equipment in the process!
Minnesota Food Code does set some pretty tight restrictions on filling a customer's containers-what is allowed and how it must be done. The law hasn't changed, but some businesses may have changed what they do based on their own perceptions or concerns about their image or liability.
If you like policy and want to read the text in the Food Code, you can use this link to find it (starting on page 66).
https://www.revisor.mn.gov/rules/pdf/4626/2019-01-02%2010:01:40+00:00