Dr Filibuster's Fabulous Wet-Start, No-Heat Fireworks

Dr Filibuster's Fabulous Wet-Start, No-Heat Fireworks are magical fireworks that are presumably set off when wettened.

Known uses[]

Fred and George Weasley and Lee Jordan bought some at Gambol and Japes Wizarding Joke Shop in 1992. Fred and George later put on a display of them on the evening of 31 August of that year.^[1]
Harry Potter later borrowed a firework from Fred and used it to explode Gregory Goyle's cauldron in Potions class. This created a distraction that allowed Hermione Granger to slip out of the room to get the boomslang skin that she required.
On the way to Hogwarts in 1994, Fred's trunk fell open, setting off a number of the Filibuster fireworks he'd packed. The Muggle taxi driver who was carrying the trunk was alarmed by the incident.
On 24 November of that year, following the first task of the Triwizard Tournament, Lee Jordan let off some of these during a surprise party to celebrate Harry's having gotten past the Hungarian Horntail.^[2]
In 1995 Fred and George Weasley were seen in the Viaduct Courtyard playing with a spark from the fireworks by throwing it into the air and catching it. A crowd of students watched this. It was however interrupted by Dolores Umbridge who pointed her wand and summoned it.
In 1996 some sparks from these fireworks exploded and fizzled around in the shop Weasleys' Wizard Wheezes.

A Filbuster Firework about to be set off.

James and Oliver Phelps attempted to set off a huge real world version of a Filbuster firework (see image at left) at the grand opening of The Wizarding World of Harry Potter. The firework did not go off. A few seconds after the device appeared to fail, however, a huge shower of fireworks went up into the sky in a section of the park close by.
Since the new Diagon Alley expansion was added to the theme park, Dr. Filibuster's shop can now be seen as well.