here is a link to towerhobbies grape scented additive. http://www2.towerhobbies.com/cgi-bin...?&I=LXERH2&P=7

why do ppl do that? Some ppl like the smell of grapes and cherries better than burning nitro and castor oil.

***edited in below***

they also have other scents http://www2.towerhobbies.com/cgi-bin...p?&C=PFE&V=PAR

coconut, cotton candy, bubble gum, rootbeer, and of course, cherry