O Some people rip off the corner of the packet with their teeth. Others, while driving, squirt the ketchup directly into their mouth, then add fries. Some forgo fries at the drive-through all together to keep from creating a mess in the car. After observing these and other "compensating behaviors," H. J. Heinz Co. says it spent three years developing a better ketchup packet. The company has tried making them bigger, easier to open, or attachable to a cup of French fries. None of the changes could be made cheaply or solve customers' main complaints—the single-serve packets are messy, hard to open and don't provide enough. Heinz sold two single-serve containers: the classic squeeze packet and a dipping cup.