Abstract: A portable collapsible container for transporting fluids. The container is formed of flexible walls that can be folded to collapse the container. A specialized rim is connected to the container walls through a transition collar which enables a hard rim to be joined to relatively soft and pliable walls. A metallic ring is embedded in an upper aspect of the container to maintain the container in cylindrical form and prevent denting of the rim which could cause separation of the lid from the rim.