Pineapple-Grapefruit Delight

This is delicious served over ice for a summer cooler.

2 1/2 cups canned pineapple-grapefruit juice
2 whole cardamom
4 whole cloves
1 (3-inch) piece cinnamon

Pour juice into a saucepan; add spices. Cover and simmer 30 minutes. Remove spices, then chill juice. For a stronger spice taste, chill juice before removing spices. Serve in small glasses before any meal, or serve over ice.