A funeral with full military honors traditionally includes a caisson to transport the body.

VOA: special.2009.05.25

Whether or not a caisson was used, the oil from the containment assembly would then pass through a manifold a sort of switching yard for pipes to one or more floating risers leading to the surface and held vertical by buoys.

ECONOMIST: Fixing oil wells

To make an oil-collecting caisson, such a pile would be used as a collar around a funnel-topped tube that would sit over the leak.

ECONOMIST: Fixing oil wells