Glop Grenades
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Owners: Puck
Age: Invented during the series
Fairy Tale: Unique to The Sisters Grimm
Author: Michael Buckley
Usage: Explode with unpleasant substances
Status: Still in use
Appearances: Magic and Other Misdemeanors

"It's my latest invention. I call it a Glop Grenade. Allow me to demonstrate."
~ Puck, from Magic and Other Misdemeanors

Glop Grenades are one of Puck's inventions, intended for pulling pranks on others. It is introduced in Book 5 and that time it is filled with furballs and chilli.