I use so many FOs suppliers, it's not funny. Right now, I am loving Fillmore Container's FOs. I've only tested a few, but they have all been great. My favorite fo suppliers are MMS (Majestic Mountain Sage), Backwoods, and Peaks. I also like a few from The Candle Source and Candle Science. Oh, and I'm really starting to like Pure Fragrance Oil, too. The list could go on. Not sure I'm much help here. Flair- just a word of warning - you might want to stop yourself before you go looking at other suppliers. Addiction will follow!!! And you will find yourself trying every supplier you hear about, just to make sure you are not missing out on something. it's terrible, but fun.