Which breakfast product innovation, launched in the late 1990s, created a new billion-dollar category by making cereal portable for on-the-go consumption?

In the competitive world of breakfast cereals, one product launch strategy completely transformed the market and created a billion-dollar subcategory almost overnight. This product innovation combined traditional cereal elements with a completely new format that appealed to busy consumers and changed how millions start their day. Test your knowledge of this revolutionary product launch that competitors quickly attempted to replicate!

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Cereal Bars (like Kellogg's Nutri-Grain)
Go-Gurt (Yogurt in tubes)
Breakfast Sandwiches (like Jimmy Dean)
Cereal Breakfast Drink (like Carnation Breakfast Essentials)