This easy hack will help transform your brown thumb into a green one. Carefully cut off the bottom of a used water bottle with an Exacto knife and recycle it. With the lid of the bottle screwed on, place the bottle on top of newly planted and watered seeds. Keep the bottle on as the plant starts to sprout and grow stronger. Make sure the soil is moist while the seeds grow into seedlings and are ready to be transplanted into the ground. Reuse the bottle for your next round of seedlings.