Chantico was made of steamed cocoa butter and whole milk. photobucket/welsh73 Starbucks is constantly coming out with new drinks and products to keep customers coming back again and again for a fresh twist on their caffeine fix.

Some beverages, like the Pumpkin Spice Latte that debuted in 2004, have become mainstays on Starbucks' menu.

But others, like "Chantico" liquid chocolate and "Mazagran" — a coffee-and-soda hybrid — failed miserably.

We rounded up some of Starbucks' biggest fails with the help of Melody Overton, a Seattle attorney who runs the blog StarbucksMelody.com.