For what its worth: Diving Ketchup. The packets float or sink depending on whether or not an air bubble is trapped in the pacquet during the manufacturing process. I thought it was trippy that all of the Carls Jr. packets floated and all of the IN-N-OUTS sank.
When you sqeeze the bottle it squishes the air bubble inside the packet therefore increasing the density of the packet and it sinks.
I can't recall if this one of Mr. Wizards show stoppers, or Boyles pVk. I don't think it was from my Straight Arrow Ingenuity Cards...or was it. I don't know. Whatever, truly enjoy Gladmans interesting posts.
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