Giving some thought to the material used in these spatulas, I decided to refresh my memory about silicone that contains certain adulterants and came across this site - http://www.lifewithoutplastic.com/store/is_silicone_a_plastic#.V7BcKxL2ZrQ.
There's a lot of info at the site that some here may find useful. One item is a method for determining if a product is pure silicone, as opposed to adulterated silicone. Do the spatulas mentioned in this thread pass this test?
If you are going to use silicone, be sure it is high quality, food grade silicone and does not contain any fillers.
To test a product for fillers you can pinch and twist a flat surface of it to see if any white shows through. If so, a filler likely
has been used. As a result, the product may not be uniformly heat resistant and may impart an odor to food. But most
importantly, you will have no idea what the filler is and it may leach unknown chemicals into the food. For all you know,
the filler may be a silicone of low quality or not silicone at all.