Place raspberries in a food processor; cover and process until blended. Strain raspberries, reserving juice. Discard seeds. Place juice in a Dutch oven; stir in sugar and lemon juice. Heat over medium-high heat to 190°. Do not boil.
Remove from heat; skim off foam. Carefully ladle hot mixture into five hot 1-pint jars, leaving 1/4-in. headspace. Wipe rims; screw on bands until fingertip tight.
Place jars into canner simmering water, ensuring that they are completely covered with water. Bring to a boil; process for 10 minutes. Remove jars and cool.
To use concentrate: Mix 1 pint concentrate with 1 pint tonic water. Serve over ice.
2 ounces whiskey or bourbon (we used Heritage Distilling)
¾ ounce freshly squeezed lime juice (approx ½ a large lime)
4-6 ounces ginger beer, chilled
Garnish: lime twist or wedge
Add whiskey and lime juice to a cocktail shaker and fill with ice. Shake until well chilled, about 15 seconds. Strain into an ice-filled highball glass. Top with ginger beer and garnish with lime twist or wedge.