Set a saucepan over medium heat.
Add 1 cup fruit juice, 1 tablespoon sugar, and 2 teaspoons agar-agar powder to the pan.
Mix well and bring to a boil. Keep boiling for 1 minute.
Turn off the heat and immediately pour the mixture onto a silicone mold.
Gently transfer the mold to your fridge and let it chill for 15-20 minutes.
