We can make tiny glass bottles if the market demands it.

I imagine the people who get takeout sushi and the people who have a bottle of soy sauce in their fridge are largely different groups.

Tbh there's your answer, fix that. Buy some damn soy sauce, they sell it at the most basic stores.

But that doesn't solve the issue for people eating it at a third location, like work, their car, or an unprepared friend's house, can't buy bottles of soy for literally everywhere you go "just in case" and such.

Maybe we still need them for that, but we can also be mindful of our circumstances and prepare/choose appropriately. Would require people to change personally however, so keep waiting lol.

Hell maybe we just make it common for them to sell little 4oz resealable glass bottles of kikkoman at the Chinese spot, then one can still be unprepared and still get the sauce there (though it'd be cheaper if they prepare next time), and whatever sauce isn't used is retainable. Still not perfect since those bottles have plastic tops, but it's something! Maybe make the caps out of hemp plastic for added bonus?

If my wife wasn't soy intolerant I'd have a bottle of soy sauce in my fridge (her issues with soy mean I really only get east Asian food when going out) and if she liked fish I'd get takeout sushi sometimes. Though honestly if she liked fish and could eat soy sauce I'd've learned to make sushi by now, so maybe I'm not the default here

Well, they claim capitalism is the best driver there is for invention, so this should be sorted before Wednesday!

Single use foil pouches.

Banning the soy sauce packets would force a mindset change. A new solution would be restaurants having the full size bottles and when you pick up, you can bring a Tupperware to fill.

I need the tldr of this entire thread