Hey Pandas, What Breakfast Cereal Should Definitely Stop Being Made?

In this world of every kind of lovely breakfast food, cereal remains one of the most commonly consumed, appearing in all shapes and flavors and at all times of the day. However, we can't deny that while some are a win every time, some should for CERTAIN be left in the back storerooms. What cereal would you rather never see gracing the shelves of the grocery store again? I'll go first - Grape Nuts are like eating gravel and should not exist.