I just had to trim their long bottom funnels shorter. They have proven to be durable and easy to clean with no ‘red staining’ from tomato recipes and such. I have been using them happily for decades. ^L^ I nest them and hang the big one from a suction-cup hook on a tile under the cabinets near the stove so they are always handy. ~L~
Automotive funnels are typically made from high-quality, chemical-resistant plastics such as copolymer plastic or BPA-free polyethylene, just like kitchen funnels. I am not worried if the plastic is not officially “food” or NSF rated. Why would they bother with automotive funnels? But then neither are my spatulas nor any of my tupperware containers. ^L^ They have no odor, nor do they seem to absorb any odors and they impart no odors or flavors to the materials I have used them with. I am going to keep using them.
Well, that’s probably the most commonly used plastic or polyethylene, often used for its higher heat resistance, which would make sense for automotive and kitchen use. Most plastic food containers are made from High Density Polyethylene (HDPE).
And remember these are just funnels used for material transfer; typically from a large container to a smaller one. The material being transferred is in contact with the funnel for mere seconds. I am not sure what (if any) issues folks should be concerned with. ^L^
