This rig enables an angled pull test to measure the peel strength of the sealed tops of cream, yoghurt and similar product containers. A carrier plate is mounted on to the base of the Texture Analyser so that a pulley and captive wire are located precisely below the load cell. One end of the wire is connected to the load cell and the other end is free to attach to the pull-tab on the container. The container is held in an insert mounted on the carrier plate which provides an exact fit for the container. Inserts of any shape are made to order for each container, such as those used to hold ready meals, chemical and pharmaceutical products.