Despite their relative fragility, glass containers were produced for the transport and storage of liquids from very early on. Such vessels have thick walls, convenient handles, their bodies are usually cylindrical or square. The handles do not protrude beyond the walls, making it possible to pack and store the jugs tightly. Square vessels such as this one could be packed and stored with an even greater economy of space than the cylindrical ones. These were either blown in moulds or free-blown, the body shaped on the marver by flattening. Though it is normally assumed that this type of jars served mainly for the transport and storage of liquids, since they were considered quality containers in their right own, often were they reused even in funerary contexts, especially in western Europe.