mind tester

during the holidays, i was shopping around with my mum & sis for groceries in a shopping market back in my hometown...we chance upon this interesting tester...! ^^ u know how everybody likes testers right! the more the better! haha... xD i personally loves testers too...however....this one tester that i saw...*fuh....* its a miracle if anyone will be wiling to try it there & then! okie okie.....well...i know u r asking me " how can one say no to tester?!? free things to test....u dowan a? only stupid people will refuse a tester! " well..maybe u will stand with me on this special unique case! behold....the tester that we saw.........is...........
*drum rolls*....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.*tadah*

freakin SANITARY tester.............*snigger & giggle*

can anyone please kindly tell me how do you test it there? lol...xD