a container for viscous materials having volatile components is constructed to have substantial transparency . the container includes a tubular housing having first and second closing structures at opposite ends . the housing may be entirely constructed of amorphous nylon , but preferably is formed as a laminate having a relatively thin inner lining of high barrier amorphous nylon and an outer sleeve of low barrier plastic , such as plyethylene terephthalate . in one embodiment the container is adapted for caulking compounds wherein the first closing structure is an end wall , nozzle and snout assembly and wherein the second closing structure is defined by a moveable piston slideably received in the housing interior . the transparent side wall of the housing and the snout are indexed whereby the snout is severed at a desired location , which determines the outlet size , and the side wall indexing is correlated to outlet size to inform the user of the length of the caulking bead that may be obtained from the contents remaining in the housing as shown by the position of the piston relative to the side wall indexing .