Why is the soda fountain foamy?
August 29, 2012 1:55 PM Subscribe
Two soda fountains. Two paper cups full of ice. The first fountain consistently dispenses soda into its cup with very little foam. You could fill it all the way up to the top without having to stop once to let the foam subside.
The second consistently produces a very foamy drink, so that you have to stop, let the foam subside, fill again, stop, start, etc. until your cup is full.
What's the difference? Why the foamy soda?
posted by stupidsexyFlanders to science & nature (9 answers total) 1 user marked this as a favorite
Same soda: diet coke.
No noticeable taste difference in the dispensed drinks.
Not the same ice: each fountain produces it own ice.
Not the exact same cups, but the same type: waxed paper.
Also, I have read the poured soda foams less if you wet the ice first. I have tried this on fountain #2 and it is not the case.