"This is the ideal starter cauldron, as used by first-year students at Hogwarts. It’s perfect for brewing a wide range of potions and carrying books to class"
Brewing potion in pewter cauldron
The Pewter Cauldron is used for brewing potions.
Brewing potions in a Pewter Cauldron reduces the time you need to wait for certain potions to finish brewing.
A Pewter Cauldron can be bought from Potage's Cauldron Shop for 15 Galleons.
Trivia[]
According to the Pottermore Insider, the Pewter cauldron is the most commonly purchased cauldron.