In case you were considering buying a smokeless ashtray as a passive aggressive (or just plain bitchy) way of hinting that you can't stand second hand smoke, here's something to consider:
There's no way people are going to huddle around this thing and gently exhale their second-hand smoke into it so that it doesn't go into the air. Especially the defensive smokers I know.
Smokeless Ashtray filters out annoying tobacco smoke - leaves air fresh. Special filtering system draws in and traps smoke and its odors. Ideal for the courteous smoker or non-smoker who lives with a smoker. Uses 2 C batteries (not included). 5-1/4 $7.98 [Harriet Carter]