I've worked in the plastic industry for 9 years now.
It has made me be more conscious of how I use it and make sure I use it properly.
Like... Never EVER use a polyethylene bag from the supermarket to freeze things inside. Those are made with non FDA grade plastic and your food can get contaminated with bad stuff.
Don't put in the microwave plastic that is not meant for it. It releases "bad stuff" (again).
The industry promotes "reduce, reuse, recycle" as a sustainable business model to also protect the environment.
Reduce means down gauge: use thinner versions, like a smaller cap, thinner film equally strong for shopping bags, thinner bottles, etc
Reuse means that... Reuse the containers. Don't just use it once but do it smartly. If the container was never in direct contact with food/liquids to be consumed, don't use it for food. Like supermarket/shopping bags... Never use them to be in direct contact with food (they are not ziplocks), but do use them as garbage bags or to carry things (even wrapped food). Or sauce containers.
Most plastics will become brittle and break in the freezer if the container wasn't mean for freezer (because of the blend of resins) but it's no big deal... You just won't be able to use it as much.
Recycle is self explanatory right?
Most plastics (resins) have the ability to be recycled lots of times.
Industries don't usually use it more than once or twice because it breaks the molecules and the resins need to be re-stabilized to avoid production problems and bad quality.
If anyone has any questions, let me know!
I've learned quite a bit of resins and their chemistry/benefits along the way (although I work in marketing and I'm not technical... But you gotta know the product to offer its benefits right?)