-- such as contain toothpaste, salves, etc. -- are now made of plastic rather than metal, which is a blessing in that they no longer break & leak, but does make them hard to keep rolled up. That, however, can be accomplished with the spring clamps that are available in various sizes from stationers for use as paper clips.
Incidentally, at camping-equipment stores you can buy empty squeeze tubes that open at the back & can be loaded with anything you please. They can be used around the house as well; I use one for honey (a commodity that is hard to dispense neatly in any traditional way). Wrap the screw cap in enough turns of tape that the tube can be stood on it.