S6 in my case (he says, rustling his Werther's Originals in his leather armchair, blaming the cats for the smell).Still got my S10, although the canisters are nowhere near in date. I can say that they work very well for cleaning up when the cat has diarrhea occasionally. Can’t stand the smell, and the S10 does a grand job of keeping it out. Of course it stinks of rubber, CS, sweat, gun oil & cordite even after all these years, but that’s quite a heady mix
Worked a treat for DIY to keep MDF dust out of eyes and lungs, back when I was younger and broke and making furniture seemed cheaper than buying it - unless you were buying from MFI, but their stuff was made out of pressed Bran Flakes...