We give away 8oz. and sell 16oz. for $6.95. It isn't a profit item, we want customers to grab our brand when they have a spill. It's a fridge magnet that no one throws away.
We use a formula that Dave Burns came up with in the 60s, bottled by a local manufacturer to keep the liabilities of being a chemical packager with them. To get the cost down to $1 per bottle we're working in lots of 20,000, and the cap is the most expensive single component.
Below 1,000 bottles the cost per each would be higher than the private labeling programs offered by industry suppliers.
(Spot Off and Got Spots are trademarked BTW)