i don't think any of them have prohibited it. Although i was wondering if you could help me build a polystyrene free lunch box
an air gap would be best - but best of all would be no material ( a vacuum -similar to a vacuum flask for drinks ) as most of the heat is lost or gained by conduction- polystyrene is popular as it's cheap and easy to work with- expanded polyurethane foam is popular as it can be injected into the cavity- but anything that's non toxic and has a lot or air gaps inside it will work fine to line the lunch box with!
In Hungary :)
If the foam lunch or dinner plates are made of polystyrene (marked with a number "6" in the recycling symbol), then yes, they can be recycled. These products are not typically recycled, however, due to a lack of public awareness as to the location of facilities that can do this sort of recycling.
$.047 is what I hear the Portland, Oregon school district pays. http://biogreenproducts.biz can supply them at that price with an additive that makes them biodegrade in landfills.
have lunch
We did not take our lunch. We have not had our lunch. We have not taken lunch.
What did you have for lunch. It makes much more sense than what did you had for lunch.
Unless your lunch is literally running from you, it is "go to lunch."
The past tense of "have lunch" is "had lunch."
Exit to lunch
Both are correct with different meaning. I'm on lunchmeans either "I'm on my lunch-break" or "I'm the one taking care of the lunch-duty." I'm at lunch means simply means "I'm at lunch."
Breakfast and lunch were . . . "