Cut off the top 5-inches of the soda bottle with the scissors.
Cut off the bottom 5-inches of the soda bottle with the scissors.
Mix 2 cups of potting soil with water in the bowl until the soil is damp but not wet. Fill the bottom 5-inch high portion of the soda bottle 3/4 full with potting soil.
Plant the herb seeds at a depth recommended by the seed packet instructions.
Place the large portion of the soda bottle upside down over the bottom portion that contains the soil and seed.
Place the finished herb terrarium in a sunny location. Check every day to make sure the soil is moist, adding more water if needed.