Mr. Bubble's Shockingly Delicious Ice Cream

Source
This item is a quest reward from Mr. D's Wild Ride and Mr. P's Wild Ride.

Trivia
Nickname for the Big Daddies that protect the Little Sisters. The questline leading up to this reward is also filled with Bioshock references--Clarissa and Alice as Little Sisters, Mr. P's Wild Ride for Big Papa, Mr. D's Wild Ride for Big Daddy, and Anderov Ryon for Rapture's founder who yells out similar quotes.