Hadn't used it them a while and didn't want to throw it away. Bought a couple of these and reused them many times. Hadn't used them in a while but decided to clean them up. The hard part was inside, but I was able to clean that with some paper towels and the end of a thin fork to scrub the inside surface. Seems really clean now. The only issue was that the old foam (polyethylene or polypropylene?) was really nasty. Didn't look moldy or anything, but definitely stained with years of dried soy sauce that will never clean out. So I tossed them. There are places that sell replacement caps complete with gaskets. I guess this would be for restaurants that have them tableside, especially where they might crack or just get dirty. But I've found they're pretty sturdy although the gasket gets nasty over time. And the place I mostly see them is at Chinese restaurants. I played around with it and I don't really see it leaking even without the gasket, but fairly tight.
https://allstaterec.com/product/soy-sauce-bottle-replacement-cap-only/
https://fsiseattle.com/product/kikkoman-caps-for-empty-dispensers/
https://www.jfc.com/product/item/22013
I've occasionally seen the lower sodium version dispenser that comes with a green cap. I don't think Kikkoman sells these bottles unless they're filled.
It's this bottle other than an older version with an older label. I guess they stopped using sodium benzoate. I know the Japanese PET bottled version says that it uses alcohol as a preservative, although soy sauce naturally contains alcohol produced in the brewing process.
I wasn't aware that the two holes also allows for control. One can place a finger to cover the top hole to stop the flow by closing off the venting.
https://www.kikkoman.co.uk/food-stories/detail/kikkoman-control-hole
https://allstaterec.com/product/soy-sauce-bottle-replacement-cap-only/
https://fsiseattle.com/product/kikkoman-caps-for-empty-dispensers/
https://www.jfc.com/product/item/22013
I've occasionally seen the lower sodium version dispenser that comes with a green cap. I don't think Kikkoman sells these bottles unless they're filled.
It's this bottle other than an older version with an older label. I guess they stopped using sodium benzoate. I know the Japanese PET bottled version says that it uses alcohol as a preservative, although soy sauce naturally contains alcohol produced in the brewing process.

I wasn't aware that the two holes also allows for control. One can place a finger to cover the top hole to stop the flow by closing off the venting.
https://www.kikkoman.co.uk/food-stories/detail/kikkoman-control-hole