Not to be confused with Blood.
Diet Blood is a beverage that SpongeBob is seen drinking in the episode "Born to Be Wild."
Diet Blood is a beverage that comes in a red cup. The cup is labeled "Diet Blood" in dark red font. It has a lid and a straw.
Role in episode
SpongeBob is seen drinking it after he mentions how bloodthirsty he is. Patrick
first offers him some Blood
, but SpongeBob politely says no "thank you" because he has Diet Blood.