In a mixing bowl, combine the fruit juice and sugar or sweetener. Stir well until the sugar is fully dissolved.

Sprinkle in the sodium alginate slowly while blending with an immersion or regular blender. Blend until completely smooth with no clumps.

Let the mixture sit for 30 minutes to remove air bubbles.

In a separate bowl, mix 4 cups cold water with calcium lactate until dissolved to form a calcium bath.

Use a dropper to drip the juice mixture into the calcium bath. The drops will form spheres.

Let them sit in the bath for 1–2 minutes to form a thin gel layer.

Remove with a slotted spoon and rinse in clean water.

Serve immediately or store in fruit juice in the fridge for up to 24 hours.