Drain juice from a 20 oz. can of Sliced Pineapple Rings (leave rings in can) and bring juice to a boil. Combine boiling juice with 3 oz pkg. lime or strawberry jello & mix really well. Do NOT add the cold water like the directions say. Pour the mixture into the can of pineapple rings. Run a fork down the center to get the jello in between each ring. Chill. To serve, cut bottom of can, push through and slice between each ring.