this post was submitted on 31 Aug 2025
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The device known as shoyu-tai (or soy-sauce snapper in Japanese) was invented in 1954 by Teruo Watanabe, the founder of Osaka-based company Asahi Sogyo, according to a report from Japan’s Radio Kansai.

It was then common for glass and ceramic containers to be used but the advent of cheap industrial plastics allowed the creation of a small polyethylene container in the shape of a fish, officially named the “Lunch Charm”.

The invention quickly spread around Japan and eventually worldwide, and it is estimated that billions have been produced.

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[–] arc99@lemmy.world 1 points 16 hours ago

Some people just don’t appreciate the irony of killing turtles with fish-shaped plastic, what can you do

PLA isn't food safe in 3d printing mostly because of layers on a print trap foreign material / bacteria and water can also seep into microscopic gaps into infill and it becomes a breeding ground. I doubt it would be useful for anything squeezy but it might be useful for single use forks and other utensils. But paper / wood can do those things already so I don't see PLA being much use. For sachets I expect the answer is paper with some kind of biodegradable lining which gives a product a shelf life of a few years but does degrade in time.

Also, some "biodegradable" products are only compostable in specialist facilities where it can be shredded and broken down with water / heat / pressure. I think PLA is a bit like that. If you print something out of PLA and stick it out in the garden or even toss it into a compost bin it'll still be there in 10 years although it might be faded, warped & brittle. Maybe it eventually biodegrades but it's not quick enough.