This is also a great idea for starting seeds as the moisture comes from the bottom, thus eliminating the fungus that kills many seedlings when you water from the top.need to bottles tho and I don't drink soft drinks.
Save your large egg shells next time and plant with seeds. Once plants are large enough, just transfer the whole egg into the ground. The shell is actually a great fertilizer and the roots will be able to break right through.
A better way to grow cilantro. Try this method for a fast, continuous crop. Wouldn't it be nice to have fresh cilantro growing right outside your kitchen door? Whenever you wanted to fix Mexican salsa. I have a container just like this, think I'll try it!