Product review (3 stars): Overpriced
The splash guard works fine, and will probably continue to work fine for months. With disposals having warranties of a decade or longer, it should be expected that people will need a dozen or more of these over the life of the disposal. The stopper, on the other hand, might last as long as the disposal. Waste King could have packaged these in a three pack. They could have left out the stopper completely and sold it separately. Instead they assure that if you buy three splash guards, you will buy three stoppers. Some people never use a stopper. I have a dishwasher and don't have any need to fill up my sink on a regular basis, or even an occasional one. How many new stoppers does a person need?

For the same reason you can't buy an individual vacuum cleaner bag, or even an individual vacuum cleaner belt, selling one of these alone doesn't make much sense to begin with. Selling it with a stopper makes even less sense.