Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Do these sheets contain bpa or teflon?
Document: These work as well as you could possibly want. I use this product in my Excalibur dehydrator, but I also use them for rolling PMC (precious metal clay). This is a much, much cheaper way to purchase this teflon material than buying it in tiny sizes at top dollar from jewelry supply websites.
Make my corn chips in the dehydrator by spreading the goop on these sheets. They do a great job. Recommended.
These sheets are used when dehydrating wet stuff. They appear reasonably durable and are easy to clean. Delivery  was good.
If you buy a Excalibur Dehydrator then this sheets are mandatory. Excellent quality. price is cheap but top product. Thanks
I store them on the racks in the machine when I'm not dehydrating. I am very pleased with these dehydrating sheets and appreciate their affordability.
Crackers, saucy items that need to be more dense.......these sheets really allow you to jump into your un-cook books!
These sheets are great. I have used them with fruit and jerky and the cleanup is so easy. If you have a dehydrator, get these. I highly recommend them.
The reason I bought these sheets is to make fruit leather or roll ups with the all the fruits that are and will be coming into season this summer.
Recommended 15 inch sheets when 11 inch sheets were needed. Daughter couldn't figure out she needed to cut them. Thanks.
Dehydrate a lot of food and these sheets are great. The food does not stick and it is easy to wipe and keep clean. Worth the purchase.
Answer: Kari, I found this information from various sites on the web.  "Aug 31st, 2009 at 11:09 am     We have contacted our vendor and here's the scoop.  The premium paraflex sheets are made of pure Teflon (which is very soft by itself) and is reinforced with fiber.  The vendor claims that the Teflon will not come off on the dried food.  They do say not to use an abrasive cleaner that will scratch the Teflon.  It is very easy to clean since food doesn't stick to it.  Just use a sponge and soapy water and rinse.  They also say that you shouldn't soak the sheets in water because they will absorb water and expand and will need to be dried out before using them in the dehydrator.  Soaking them will also shorten their lifespan."Another web site has this to say, "Please note that "Paraflexx" is the brand name of the food drying sheets. The only non-Teflon sheet made by Paraflexx is the Paraflexx "Ultra" Food Drying Sheet, which is orange in color. Not all "Paraflexx" sheets are non Teflon. Paraflexx also makes a Paraflexx "Premium" Sheet, which is brown in color on both sides with a Telfon surface. To protect your health, the Paraflexx Ultra Food Drying Sheet is non-Teflon®. Other food drying sheets such as Teflex sheets, Paraflexx Premium Sheets and other generic food drying sheets are Teflon coated. The only reusable food drying sheet on the market that is not Teflon coated is the Paraflexx "Ultra" Food Drying Sheet."  The only dehydrator sheet that claims to be both teflon and BPA free is made by Sedona dehydrator.  To find out more about BPA refer to: http://www.bisphenol-a.org/about/faq.html?gclid=CKzazsbD67UCFeZFMgodOW8Adg#aFrom Wikipedia, "A 2010 report from the United States Food and Drug Administration (FDA) warned of possible hazards to fetuses, infants, and young children.[2] In September 2010, Canada became the first country to declare BPA a toxic substance.[3][4] The European Union, Canada, and recently the United States have banned BPA use in baby bottles.[5]"