Reddit mentions of Fee Brothers Bar Cocktail Bitters - Set of 6

Tequila and Anejo Tequila are very different indeed. I have been a bourbon, irish whiskey, scotch kinda guy for years. I love the taste of these fine whiskey drinks. Tequila reminded me of shots with salt and lime in my early years of drinking. Not tasty. Not for me I thought. A respectable Anejo tequila is very akin to these aged whiskeys that I so enjoy. And I think it is worthy of a try if you've never had it. I encourage you to try Tres Generaciones. It has been my favorite brand. And if nothing else, it is a really impressive looking bottle. I think it is ~$50/fifth but that varies largely from state to state, country to country, etc.

Typical Angostura bitters are aromatic. They are nothing at all like blood orange bitters. Angostura Aromatic bitters work great to round out the flavors of a cocktail, but aren't instilling a real depth of flavor imo. Blood Orange bitters are made from the rind of blood oranges and have a very distinctly orange taste and smell. They work great in a drink like this. Additionally I have regular Orange bitters, Lemon, Peach, Grapefruit, and Mint. I have seen others like Lavendar I think, but haven't tried them (I have this image of a girly purple drink in my head. No thanks. Haha). They're all really interesting to experiment with. I love the mint bitters around St. Patrick's day or Christmas as the green color is fun. You can also get a green drink if you use orange juice and Blue Curacao in the right proportions.

I get my bitters at A Southern Season, which is local to me. But I suspect high end grocers and the like will have similar selections. You can also try ordering Fee Brothers on Amazon. I am feeling a bit like a lush now, but it is something I am pretty heavily interested in. Always down to talk spirits.