Welcome to state-of-the-art kitchen technology, 80s style!
My parents had the model in the middle (or something very close to it). This was a kitchen appliance that I positively monopolized.
Around 1982, I discovered fitness, and with that came an obsession with protein powder. Throughout my high school years, I experimented with various iterations of the whey-based protein shake. I often included such exotic ingredients as raw eggs and frozen bananas.
The great thing about a whey protein shake? It can be made to taste sort of like a milkshake, while still being good for you!
Much to my chagrin, I did not turn into Arnold Schwarzenegger, even with all those whey shakes, and countless hours spent in the gym. (Many of us really are limited by our genetics, in the quest to become Mr. Universe.)
I still like protein shakes, but I don’t even own a blender anymore. Nowadays, I opt for a modern, streamlined solution: the kinetic blender/shaker bottle. There are some good ones here on this Amazon page.
-ET