The internet is your bitters playground. Sites like Amazon, The Bitter Housewife, or Bitters & Bottles ship everywhere. You can buy a “Bitters Advent Calendar” for December. That’s a real thing.
Etsy is great for homemade, artisanal stuff. One seller made a “Pickle Brine” bitter. Yes, for martinis. Another made “Smoked Bacon” bitters. Put that in a Bloody Mary and bam—breakfast in a glass.
Warning: shipping booze has laws. Some states are strict, some are not. Always check the website’s fine print. You don’t want your mystery bitters seized by the Bitter Police (not a real thing, but still).