The episode: “The Blood Waters of Dr. Z,” ep. 1005
The riff: Whined by Mike in a nerdy voice while the movie’s apparently mad scientists spends the opening credits slowly ambling around outside, accomplishing nothing.
The explanation: Sustacal is a liquid nutritional supplement, apparently in the mold of the better-known Ensure. It is “recommended for cases of loss of appetite, unintentional weight loss, rehabilitation after injury, malnutrition in elderly, and for pre- and post-operation.” It only seems to be available in one flavor, Vanilla, although I’m not positive it’s still sold in the United States due to many of the references I’ve found being in Spanish. It seems like something that may have been available in the past but is no longer in the U.S. today.
Novelty factor: Never heard of it before. From the context, I kind of assumed it would be a multivitamin like Centrum.