1 (2 liter) bottle ginger ale
1 (2 inch) piece fresh ginger root, peeled and sliced
1/2 cup cinnamon red hot candies
2 cinnamon sticks, or more to taste
2 habanero peppers, cut into 6 pieces (wear gloves)
1 (12 fluid ounce) can grapefruit-flavored soda (such as Squirt®), or more to taste (optional)
1 drop red food coloring, or desired color (optional)
Combine the ginger ale, ginger, red hot candies, and cinnamon sticks in a large container; refrigerate until the candies dissolve completely, 8 hours or overnight.
Add the habanero peppers to the ginger ale mixture for 4 hours or desired time; remove and discard peppers. Serve in small glasses.