Cooking In and Drinking Out of Plastic - Part 2
In short: Don't do it.
The websites promoting these products claim that the plastic does not transfer into food. However, they don't provide any safety studies or even tell you what types of plastics are used in the bags.
I have to say that I don't buy it. Plastic water bottles have been around for many years and now there is finally evidence coming out that they leach chemicals that cause cancer. These plastic bags are brand new products. They are also thin, pliable plastic. In general, the more pliable (ie. the softer) a plastic is the more chemicals they tend to leach. And plastics leach more chemicals when they are heated.
And remember: the number one goal of these companies is to sell you their product. Whether or not it's good for your health is not important when it comes to a company's bottom line.
Don't waste healthy ingredients by cooking your foods in plastic of any kind. This includes food steaming bags, slow-cooker bags, instant rice in bags, plastic containers and so on. If it's plastic, keep it away from cooking food or hot food.
TC