Generic name: Plastic shopping bag.
Active ingredient: Slip agents.
Can you make it? Not really.
No, the slip agents in plastic bags are rendered from animal fats.
Depends on whether you believe handling bags that may contain pork fat is haram, or whether you believe that it’s halal so long as you do not ingest it.
On top of animal welfare issues, plastic bags are usually not recyclable or biodegradable, and present a hazard to wildlife.
None that I am aware of.
Any cotton, jute or bamboo tote bags. Or just use your backpack!
Are there store brands?
Yes, most supermarkets offer a recyclable or fabric bag you can reuse.