Tuluma are carved from a single block of wood, usually taiuli (dark wood of the kanava, Cordia subcordata), and are oval in shape, with lugs (taliga) on either side and on top of the tāpuni (lid) which has kafa (coconut sennit cordage) threaded through each lug (taliga) and tightened to secure the lid to the base. The tight fitting lid, kafa rope, as well as its natural buoyancy ensures that the contents of the tuluma stay safe and dry should it fall into the water.