I ran across an ad for Rubbermaid collapsible containers. They make 2.5, 4 and 6 cup containers that look like possbilities for hiking gear. Of course I don’t know what they weigh. If they are light enough they might fit a similar niche with the Orikaso bowls.
http://www.rubbermaid.com/rubbermaid/collapsibles/collapsibles.jhtml
