<human>: Which of the following solutions is better for the following goal:
What supplies are needed to make a rainbow in a bottle?

OPTIONS:
- A small, opaque bottle        Food Coloring        Water        Salt        5 small beakers (or drinking cups)        Spoon or stirrer        Scale or electronic balance (or 1/2 teaspoon)        Pipette or medicine dropper
- A small, clear bottle        Food Coloring        Water        Salt        5 small beakers (or drinking cups)        Spoon or stirrer        Scale or electronic balance (or 1/2 teaspoon)        Pipette or medicine dropper
<bot>: A small, clear bottle        Food Coloring        Water        Salt        5 small beakers (or drinking cups)        Spoon or stirrer        Scale or electronic balance (or 1/2 teaspoon)        Pipette or medicine dropper