Lugs are carved on either side of the tuluma as well as the top of the lid with a drilled hole through their centre. Kolokolo (2-ply coconut sennit cordage) is threaded through this hole . The kolokolo is threaded in such as way as to tighten or loosen according to the need to secure the lid to the base. The tight fitting lid, kolokolo, and the natural buoyancy of the tuluma ensures its contents stay safe and dry should it fall into the water. The tuluma has a smooth and matte surface treatment. Often, kilifai (stingray skin) would be used to smooth the surfaces.