A few days ago, I was in a bathroom in building 8, and saw a sign next to the soap dispenser that said that suppliers like foamy soap better because on average, you need 30-40% less soap than liquid soap to do the same job. Plus, foamy soap needs less water to make the same amount of bubbles, thereby saving water, too.
The bathroom in building 56 (my lab floor) recently installed some new soap and paper towel dispensers, along with a sign welcoming suggestions and comments regarding the new equipment because the janitorial staff is trying things/vendors out. The new soap dispenser dispenses foamy soap, so I wrote an email to the address supplied by the sign:
“I like the foamy soap!!”