patch to stick on the mouth?

[happywithit]

i heard that there are some patches that you stick inside your mouth and it refresh the smell of your mouth, does anyone knows the name please?
my friend's mouth has some smell on it, she is trying everything and she heard about this but doesn't know where to buy them.
she is consulting doctors is well but its not helping.

[WhataRacquet]

www.listerine.com/products/listerine-go/listerine-pocketpaks-oral-care-strips
She needs to see a dentist.

[happywithit]

thank you so much, really appriciated