We have a household spray bottle that we dilute with the gallon jug. You use so little that it seems to last a year. Before putting fresh shavings into litter pans, we spritz them and they are good to go, same with carrier pans.
Other stores, such as Sam's Club carry Odo-Ban but it was nice to get the "extra" deal. This past year is the first time I'd seen the aerosol spray and it's reasonable at about $4.00 a can. Most folks like the smell too.