Yeah, they make a lot of money charging $15 for 1/10 the volume of CO2 you get in a 5lb tank that also costs $15 to fill. We have a local propane and gas shop that figured out how to fill them and do it for half the cost; but, they have difficulties sometimes. My go-to for filling mine is to save up those Bed Bath and Beyond coupons for $5 off a $15 purchase and so I get it for $10.