Or you can just snip a hole in the top (air cell end) of the egg and put a piece of clear tape over it. That's how it's been done for a long time.

An egg allows for gas exchange through its shell - won't this silicon-based polymer hinder that, and thus fail to give a real impression of what's going on?

Call me stupid, but unless the THC is somehow bound to the food(e.g. boiling it in water and butter so it binds to fats of the butter), doesn't the body just metabolize it through your kidney's with no effect? This was my understanding, so wouldn't sprinkling weed on a pizza in theory have no high effect at all? …