Chill your glass: Fill a highball or stemless wine glass with ice water while you prep. Cold glass equals better fizz and slower melt.
Build the base: Add blueberry juice, white grape juice, fresh lemon juice, and grenadine to a shaker or a large jar.
Shake with ice: Add a handful of ice and shake for 10–12 seconds until the shaker feels cold. This chills and dilutes for perfect balance.
Prep the glass: Dump the ice water and fill the glass with fresh ice. If you want a sugar rim, run a lemon wedge around the rim and dip in sugar before adding ice.
Strain and top: Strain the purple base into the glass. Top with lemon-lime soda (or soda water). Gently stir once to combine without killing the bubbles.
Garnish and serve: Add a lemon wheel, a few berries, and a mint sprig. Serve immediately while it’s extra fizzy.
Use fresh lemon juice: Bottled lemon tastes harsh and flat. Fresh juice keeps the flavors bright.
Mind the chill: Cold ingredients taste smoother. Keep juices in the fridge for the best sip.
Balance to taste: Too tart? Add a splash more soda. Too sweet? Squeeze a bit more lemon.
Color control: Want deeper purple? Add 1–2 teaspoons more blueberry or a dash more grenadine.
