The collapsiable cauldron is a cauldron, that is capable of being collapsed together for transportation, easier storage and convenience. Another name for this cauldron is Portiable cauldron. Potages Cauldron in Diagon Alley sells collapsiable cauldrons for 3 galleons per piece.

Bruno Schmidt, a six year old German boy, once killed an erkling with a collapsiable cauldron that was owned by his father. He saved his own life by using the cauldron. 

Credits/References

• Harry Potter and the Philosopher's Stone
• Fantasic Beasts and Where to Find Them

Credit to Andrew Sutherland for code and design!