Abstract: An insulating carrier for containers comprises a receptacle adapted to receive and enclose a container holding hot or cold contents to be kept at substantially a desired temperature for an extended length of time. The receptacle includes a generally cup-shaped open-topped body formed from insulating foam plastic material and providing an upwardly opening container-receiving chamber. An external generally radially extending and axially elongated lug handle on the receptacle body is adapted for assembly of an adaptor for mounting the carrier on a support. The adaptor includes a body portion for engaging the lug handle of the receptacle, and has means for securing the adaptor to the receptacle body and means for attaching the adaptor to a support on which the carrier is to be mounted. A neck on the upper end of the receptacle body projects upwardly above the upper end of the lug handle, and an insulating cover for closing the open top of the body has a skirt flange for retaining engagement with the neck.