Originally Posted by
4nsicdoc
Try rubbing alcohol. It has pretty close to the same specific gravity/density(.877+-) as vodka(.95 for Skyy).
This time of the year in Texas you ought to be able to get small watermelons for about a nickel. Take two, one regular and one that has been infused. Do not do the test yourself. Ask your x-ray operators and see if they can pick the spiked one.