G: TL;DR: To make a homemade version of Ecto Cooler Hi-C, mix orange juice, tangerine juice (or orange-tangerine mix), lemonade, sugar or simple syrup, and green food coloring. Chill and serve.

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🧪 Homemade Ecto Cooler Recipe

Ingredients:

• 3 cups orange juice (pulp-free)
• 1 cup tangerine juice (or sub with ½ cup more orange juice + ½ cup mandarin orange juice)
• ½ cup lemonade (not too tart)
• 2–4 tbsp sugar or simple syrup (adjust to taste)
• 2–4 drops green food coloring
• Optional: pinch of citric acid for tang / preservative

Instructions:

1. Combine orange juice, tangerine juice, and lemonade in a large pitcher.
2. Stir in sugar or syrup until fully dissolved.
3. Add green food coloring a drop at a time until it's that nuclear slime green (usually 2–4 drops).
4. Chill in fridge and serve cold. Optional: pour into juice boxes or mason jars with a straw for full nostalgia.

Notes:

• Ecto Cooler was essentially a citrus-heavy fruit drink with neon green coloring.
• For better shelf life, use pasteurized juices and keep chilled; no preservatives are needed if you drink it within a few days.
• You can freeze it into ice cubes or popsicles for a fun variation.

Let me know if you want a low-sugar, cocktail, or carbonated version.