> It's too much work to keep some in the trunk?

Assuming I have a car. Let me just carry some glassware around with me on the train just in case.

Actually, all of this and you have a car? Talk about prioritizing convenience over long-term sustainability. Consider using public transit instead; this is exactly what a lifestyle change looks like.

Nice try.

1. I don't have a car, and I try to leverage buses, trains, etc. when I can. Or I just walk.

2. My current city, which I have recently moved back to temporarily, is notorious for its lack of walkability or adequate public transit. Not every city is like San Francisco. Many cities in the south are explicitly designed to make things difficult for poor people, and to segregate them.

My advice was for people who do have cars. If you don't, it is not difficult to carry something around in a bag if you regularly eat out and take home leftovers. I felt no need to be exhaustive, the advice is easily modifiable to other situations.

In your rushed attempt to paint me as a hypocrite, all you've done is get an egg on your face. It sounds like you're the one who needs to change your lifestyle, and be less presumptuous.