The zipper bags are always suggested due to the fact that they seal air tight. Also they should be at least 1/2 gallon in size in order to store everything effectively
A bag that will retain heat needs to be a good insulator of heat. Clear poly bags aren't good enough at insulating heat to keep food hot for very long.
Clear poly bags can be bought in bulk from a number of companies such as Uline. The company Uline sells a number of clear poly bags in various bulk sizes.
As far as facts the best website would be MillerPolyBags.com for factual information about poly products.
Both poly bag pro and slideshare have information about poly bags for kids. For purchasing poly bags for kids Ebay is a great place to go. They have all types of poly bags for kids.
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poly bags are just plastic bags and their mil size is the thickness of the bag, check out http://www.millersupplyinc.com/ for more info
high molecular poly bags
You can purchase multiple plastic poly bags from online retailers such as Amazon. In addition to this, you can get them from local retailers e.g. supermarkets.
It varies, but companies that sell promotional bags wholesale, such as Excellent Poly, have the best prices. And lower costs do not mean poorer quality! Excellent Poly, for example, makes a variety of custom bags like die cut bags and wicketed bags. If you want to get a better idea of how to get promotional bags made and how much they will cost, you may want to visit http://www.excellentpolybags.com. Good luck!
Clear poly tarps can be purchased at home home improvement and home supplies store. The best place to purchase these would be at Home Depot, Rona or Canadian Tire.
If anything is disposed of improperly or carelessly, it can cause problems. My problem with the disposal of plastic bags and poly bags has more to do with how it is being disposed as opposed to what is being disposed. Unfortunately, there is a lot of chatter concerning the banning of plastic shopping bags and poly bags. I think this is a very bad idea. It will destroy US jobs. Less than 1% of all plastic waste in landfills is attributed to plastic bags. We put more plastic based products into our bags at the supermarket than the plastic bags themselves. Reusable / recyclable bags are the only answer along with strict recycling laws. You can purchase a wide array of plastic bags, paper bags, poly bags, shopping bags, grocery bags, non woven tote bags at http://isellpackaging.com
Use the JML Vacuum Seal storage bags. They are a great space saver, and you don't have to worry about things getting damp and spoiled, plus they come in a variety of sizes.