You talking about the new or used ones? Actually we manufacture the new a dark brown color so you never know if you are using a new or used one. The "sniff" test is the only was to tell.
Sniff test. Lol. Trouble is, my smeller don't work too well anymore. I have to use the squeeze test. I squeeze 'em hard. If nothing oozes out, they must be new.
I got caught squeezing the manpons and now they are running commercials featuring a Mr. Sniffel warning people not to squeeze the manpons.


