Abstract: At least one collapsible tube for containing at least one product, comprising: external flexible thread form on flexible throat coupled to flexible shoulder. The flexible throat and flexible shoulder flatten to dispense essentially all the contained product. The flexible shoulder may include a raised detent for stopping a cap and/or raised flexible ribs to control the direction of flattening the flexible shoulder. At least one cap for the collapsible tube including an interior bulge or an interior rim, both for urging an included interior thread form to engage with an external flexible thread form included in the flexible throat, and further including a lower surface to engage with the raised detent, and/or internal ribs and/or internal posts to engage with the raised flexible ribs. Manufacturing methods for the collapsible tubes and caps, and these items as products of the manufacturing processes.