Mason Jar Mojito: Place mint leaves and 1 lime wedge into a sturdy glass. Use a muddler to crush the mint/lime. Add 2 more lime wedges and the sugar, and muddle again. Fill the glass with ice. Pour rum and fill the glass with carbonated water.
Blackberry Thyme Sparkler: There's still time to round up ingredients for a showstopping New Year's cocktail, so hit the market for some fresh blackberries and thyme sprigs to float in this rosy Champagne flute, complete with gold sugar rim.