'Herbs for Spells' cauldron LARGE plant pot, black with green text and white stars. Made from resin. Nice and large, at H17.5cm x W21cm x D21cm and 750g.
(The small one really is quite small, and is pictured with the Green Witch cauldron mug for comparison: it's  H10cm x W12.5cm x D10cm and 320g.)