Multi-choice problem: Choose from the options at the end, and answer how do you do this: Make rainbow ice cubes.

Available options: [-] Mix food coloring in small bowls in water. Spoon a cup and a half of one color into the ice tray and freeze. Add another color and repeat. Repeat until all colors are used. [-] Mix food coloring in small bowls in water. Spoon a tablespoon of one color into the ice tray and freeze. Add another color and repeat. Repeat until all colors are used.
Mix food coloring in small bowls in water. Spoon a tablespoon of one color into the ice tray and freeze. Add another color and repeat. Repeat until all colors are used.