Eeeewww. Well, we've all overdone it on the shiitake mushrooms from time to time, but I wouldn't necessarily be offering the results to anyone else. Luckily it turns out not to be that sort of stool.
It still doesn't look all that appealing, though, to be honest. The accompanying promotional blurb gives a bit of background info:
This is certain to be the most-talked about item of furniture you ever own. New Scientist is offering one lucky reader the chance to win a beautiful stool made by artist Philip Ross from the reishi mushroom.Here's a few links explaining what Ross is up to; it's all quite interesting in a freaky sort of way, and of more obvious practical use than the food-related art projects of Cosimo Cavallaro. And presumably if you have a bit of a food crisis you can just grate a bit off the side of your stool and rustle up a tasty risotto.