Mentos

Aren't Mentos the best? Personally, I really like the mint and strawberry versions. They're just so good! The price is okay too. Let's calculate how much they cost.
One roll of Mentos costs me a dollar. Since there are fourteen Mentos in a roll, one Mento (yes, "Mento" is the singular form) will cost me just $0.07. Spectacularly cheap, right? 


Besides, you can combine mint Mentos with diet coke to create soda fountains.