FWIW: I had been refilling an old yellow plastic Ronsonol (cigarette) Lighter Fluid container with hardware store naphtha because the flip top spout makes it easy to dispense a few drops at a time. After doing this for years, I discovered that the container, recycle symbol #3, now tints the naphtha yellow and thus has contaminated it! Are Ronsonol containers still #3, PVC plastic?
Barry Cutaia