Grain neutral spirits distilled with herbs and colored with herbs.
Walton Waters is often called my "masculine" absinthe. This absinthe has a powerful louche of rolling, milky cloud banks, and it coats the tongue with flavor. Made with herbs sourced to my specifications or grown for me.
Know that in Walton Waters there are no flavoring additives from the chemical industry. There are no artificial colors. The color is completely natural and no chemical stabilizers used. So the color may well change from green to what the French call "feuille mort" or "dead leaf", a golden amber. This is the sign of a naturally colored spirit, and it shows it has received some age.
With Walton Waters you may find that it is quite sweet enough for your taste and you may not want to add sugar. But if you decide to do so, you may not want to use a whole sugar cube. You'll have to experiment with things to fit your taste and palate.
But please do not light any sugar cubes on fire! It is so wrong to do. It is not historically accurate and it does not improve the drink.