I have been trying to make a cocktail with Tubi 60, and this is the closest I've come. I was going to name it later and list it as "TBD" when I realized the the "TB" sounds like "Tubi". Hence the name!
1 oz Tubi 60
1 oz Sloe gin
1 oz Montenegro
Stir with ice, strain into cocktail coupe, to with soda water.