It's definetly more work to have to take a 6 month supply and put it in a vile and then properly measure out the correct amount of frontline into a mini saringe than just opening a 1 month packet, applying it, and then tossing the packet out. You then have to wash out the saringe without washing off the numbers on the saringe when you would ordinarily be done. That said, the extra time and hassle are probably worth the reduced price, especially when you're trying to save money.