Watering Bottles

Last Year we started this method of drip irrigation, which proved to be very successful. We put a small hole in the bottom of a plastic bottle, fill it and regulate the outflow with the cap.
The children on the farm have a ball, messing with water, something all kids love, but there's more, they learn so much.
Since it hasn't rained here for months, our water supply looks like running out!
Last year we still had substantial rainfall at this time.
Praying for rains, which are not due until mid December!!