Wash the limes. Cut 4-8 lime slices for the decoration and set them aside. Squeeze the remaining limes and pour some of the juice onto a small, flat plate until it’s covered. Cover another flat plate with fine salt. Hold one glass upside down and dip the rim in lime juice, then in salt. Repeat with the rest of the glasses. Let dry. Put frozen strawberries, elderflower soft drink, and the remaining lime juice into a blender or mixer. Blend until the drink is smooth. If it’s too dense, add more of the elderflower soft drink. Pour the Margarita strawberry slush into the prepared glasses. Garnish with fresh strawberries and lime slices.Tip!We opted for STORSINT Martini glasses for a more grown-up vibe, but this drink is also perfect for kids’ parties. Simply switch to more durable glasses and coat the rims with egg white and sprinkles instead.