Just
chew on some alfalfa , you could buy the whole shootin' match for about the same price and you'd have a
whole bale to get you through the hunting season . Just grab yersef a chaw and start chawin'...
If your breath worries you that much then just gargle with some diluted Hydrogen peroxide(50-50 with water) , and take a small jug of it with you for an occasional rinse while on stand . I think Gum-O-Flage is kinda silly and definitely overpriced.
Side note: Alfalfa is actually very rich in ahuge variety of nutrients ,and is widely available in capsule or pill form atnatural foods and health stores . It is reputed to reduce body odor with regular use due to it's chlorophyll content, and promotes good digestion . It's also a rich source of insoluble fiber .