Low-calorie sparkling waters are a great mixer for liquor such as vodka or a crisp white wine to help limit calories while helping keep you hydrated. If you're craving bubbles, try a 50/50 mix of wine and bubbly water for an effervescent treat.
For an antioxidant boost, mixing liquor or wine with a product like Drink Simple Sparkling Maple Water ($30 for a pack of 12) gives the drink a slightly sweet flavour without being overpowering and too sugary. Since maple sap naturally contains prebiotics and antioxidants, you can feel good sipping your sparkling maple water spritzer, knowing that you're getting some nutrients as well.