So first there were potato chips, and they were good. And then, in 1968, potato chips met The Jetsons, and we got...Pringles!
They came in a can! They stacked perfectly and didn't break! (That much...) They are so little related to potatoes that they had to be renamed "potato crisps"!
They have a number of flavors, including limited-edition ones that have included honey mustard, cheesy fries, onion blossom, mozzarella cheese stick, screamin' dill pickle, and Mexican layered dip (so sez Wikipedia -- I don't think I've tasted any of these).
Their cans are great for craft projects, and they have their own Facebook page. Really, they are a superb invention.