Be your own mixologist at home with Bittermilk mixers and Peak Ice Cube Trays. Bittermilk No. 5 Charred Grapefruit Tonic with Bulls Bay Sea Salt is not your typical tonic. The No.5 combines lime and lemon juice with cinchona bark, the source of quinine for tonic. The fresh grapefruit skins are charred to help bring out the bitter yet refreshing notes. Just a bit of local Bulls Bay Saltworks sea salt helps pull the savory caramel notes and balance out the flavors. It works well with any light spirit such as vodka or gin. We suggest pouring equal parts No. 5, vodka and soda water over ice in a tall glass. Garnish with a lime wedge. This is a 2017 sofi Award winner for Best Cold Beverage/Cocktail Mixer. Bittermilk is a line of cocktail mixers made for cocktail enthusiasts by bartenders with real ingredients. Crafted and bottled by human hands in Charleston, SC. The labor is in the bottle, just add booze.Peak Ice Cubes melt slower, keeping your drink colder longer. The provided lid blocks out pesky flavors from your freezer, while an internal steel frame makes filling and transporting the tray a breeze.