I actually don’t even think ‘curry’ is an Indian dish/word. I’ve certainly never come across it in any place in which I could rule out reverse borrowing from foreign usage. So posher restaurants may have such and such curry, but never a regular down to earth type place.
Yes, in India, “curry” is any saucy dish. You have to be more specific.
In fact I came to know that the Americans call it curry when I got here. Some South Indians use the word curry in India - and they use it differently, but otherwise its not a term much used in India.
Most of the restaurants that serve Indian food in the US serve Punjabi (the state of Punjab) dishes. There are restaurants from other states - but they are typically vegetarian - like Udipi or Gujarati restaurants.
Cuisines (especially meat and seafood) from many states like Bengal, Goa , Kerala etc. are extremely rare in the US.
I wonder where you can buy one of those stainless ones? They look like they could be great for camping.
Amazon. Where else?
I think the dabbawalla culture is terrific. I would love to have a fresh, home-cooked, unprocessed meal while on the job. This is far more nutritious than most of what we get for lunch. Even restaurants use prepared foods that have salt or other preservatives added. Heck, when was the last time you saw a bag of wheat flour that didn’t have nutrients added back into it (it’s called “enriched”)?
I would like that, too. Trouble is, I don’t have anyone at home to cook it. 
Or to cook it when I AM at home. That’s the one flaw in the system.
In most Indian cities, there are also tiffin businesses that make and deliver food. These are separate from the dabbawalas who are a uniquely Bombay phenomenon. It’s usually a home business(es) in the neighbourhood trying to provide economical packed dinners to single working people. The quality varies widely of course.
All RIGHT!! 
When I worked at a large firm in a Los Angeles tech/suburb, we had kind of a lunch bunch who all had home-cooked meals at home for dinner (the late meal of the day), but who liked variety for lunch. We had an informal arrangement with a few dozen people that who ever showed up at a particular room at noon each day would decide, quickly, by consensus, where all of us would go for lunch. We went to many different restaurants since the surrounding area was rich with variety. Burger King was not under consideration, but many small, ethnic, family-run restaurants were available – Chinese, Korean, Vietnamese, Cajun, BBQ, French, German, Polynesian, Mexican – you name it, we had it close by.
I can’t say that all choices were terrific, but I can say that we had an interesting lunch time. Many of us were able to sample cuisine that we might otherwise have overlooked.
So I can’t say that an Indian-style Dabawalla delivery is all that great for everyone, but that’s just a personal, cultural observation. I’m pretty sure if all of my lunch bunch had to rely upon home-cooked meals delivered, we all would have starved.
When I started reading your anecdote, I thought it would be everyone bringing a serving of leftover dinner from the previous night and then trading.
Pot luck. Not a bad idea!
I’m sure glad we didn’t think of it.