I guess it depends on how much you actually need to use it. I've still got the same 30mL bottle that i bought in the spring, but i haven't really needed to use the stuff that much. If i remember correctly, it cost me about 15 bucks, and the bottle isnt really that big (30 mL, as i said before). The company's website claims that one application gets you about 3-5 days of use, and I've found this to be the case. However, in really humid conditions i've found that sometimes the stuff wears off more quickly, and it lasts longer when the air is dryer and cooler (keep in mind that this is on a paintball mask, i ride with contact lenses in).
Pic for size reference... i'd say i've got pretty average size hands for a guy... though that pic make's 'em look kinda girly...
