The PŬK Stone (or as some call it, the "Magic Stone") transforms your PŬK into the most versatile, non-electric smoking device that we have seen on the market. It allows you to enjoy your herb in any form, whether it is traditional "flower", or "any" concentrate, including waxes, oils, and all of the others.
The PUK Stone is a porous ceramic sponge made out of an inert material called silicon Carbide. It is placed in one of the 6 bowls of your PŬK. When you place any concentrate, including waxes, oils, etc. on the PŬK Stone and heat it, the concentrate is absorbed into the pores of the PŬK Stone where it is retained until you have enjoyed every bit.
And surprisingly, the next time you use your PŬK and think that there is nothing left, you will be pleasantly surprised to find that there is still more left to enjoy. It is a little like Willy Wonka's Everlasting Gobstopper.