Came across these during recent travels across the www. Similar concept to Bung Box ink, and a couple of these are pretty nice.
translate.google
https://translate.google.com/transla...-text=&act=url
Japanese page w/links to some close ups
http://www.8989usagiya.co.jp/usagiya_original/
More close ups and details
http://www.8989usagiya.co.jp/usagiya_original/
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