Yes, as long as they aren't grenades with another name. A system similar to Dragon Age's "grenades" would be interesting though. No explosions: but say, Fire Damage in a radius of 10ft.
And, like not-grenades, they should shatter on impact - they can't be "readied" or anything.
And no [censored] "potion launchers" or [censored] like that.
And I want to be able to make invisibility not-grenades.