this is VERY oversimplified and parts are not true. polypropylene is NOT more reusable than high-density polyethylene, and the number does not have anything to do with reusability or recyclability. 7 could be anything not otherwise specified, so the material depends on the “toxicity.” as for what you’re labeling as “toxic,” the dose and route of admin make the poison.
single-use plastics are not as good as most alternatives for most things, but using blanket statements to call them “toxic” or more or less recyclable is also just misinformation. these symbols were made in the 70s to look like the recycling symbol as propaganda from plastic manufacturers but have nothing to do with renewability or toxicity.