One contained lava source slowly fills a cauldron through pointed dripstone. Empty it with a bucket to collect renewable lava.
A lava source sits on a dripstone block with a downward-pointing stalactite attached underneath. The aligned empty cauldron fills over time without consuming the source. This model shows the empty cauldron before its first refill. Harvesting is manual; a full cauldron cannot store another bucket. This original layout has not been tested in game.