Okay, here's my hack. But you gotta be extra careful because it deals with administering medications to infants.
The little guy got one of many colds so Mom sent me to the drug store for a decongestant. We're big believers in not over-medicating, so an infant preparation with only the medicine needed was in order. Except, they were out. I talked with a pharmacist about alternatives and he suggested the "children's" version at half strength.
As it turns out, the "infant" version provides 5 mg per dose, the "children" version is 10mg per dose. Simply half the children version for the same infant dose. As it turns out, the child-sized bottle contains several more doses than the infant version for the same price. When you figure twice as many doses, because you're halving the dose size for the infant, you make out double. Big savings!
The cons are that you have to be really careful and make double sure your math is correct. You also need some oral syringes (because the child size doesn't come with them) that have tiny doses marked. We figured a .4 ml dose for our little guy, not much at all.
We just happened to have plenty of oral syringes around because he's on a prescription for allergies anyway.