They can be used to clean:
Will it work on metal tea strainers as well? (like this one or the ones that look like little perforated cups?)...
Tomato sauce stains in Tupperware are the bane of my existence.
I did not know thiiiiis how useful! A lot of our Tupperware is pretty gross, and my tea cups are all stained…..
also hairdye baths!