Watering Seeds and Seedlings
I drilled holes of various numbers and sizes in orange juice bottle lids and got no cost watering devices. Water can be applied to delicate plants by using a lid with tiny holes and squeezing the bottle gently. As the plants grow, you can switch to larger holes and squeeze a bit harder. I found that a lid with two holes is ideal for watering multi-packs. All you have to do is move the bottle lengthwise while squeezing, and you can apply water quickly to both sides of the pack.
Little water is wasted with that method, and there is not much water to clean up. If you don’t own a drill, the holes can be made with a hot nail or pin, or a nail can be driven through the lid with a hammer by laying the cap on a scrap board flat side down.
by David Pojmann