Bloom: Sprinkle all 4 tablespoons of gelatin over 1/2 cup cold water. Let sit 5 minutes until spongy.
Dissolve: Pour 2 cups hot water (170F) over bloomed gelatin. Whisk 1-2 minutes until completely clear.
Flavor: Stir in 1 cup cold liquid plus any optional ingredients. Mix well.
Mold: Pour into silicone ice cube tray or 8x8 glass dish.
Chill: Refrigerate 3-4 hours until completely firm.
Store: Cut into 1-inch cubes. Store in airtight glass container in refrigerator up to 7 days.
Serve: Eat 4-5 cubes 20 minutes before each meal.