I think HoppyDaze is right if you want a quick fix/short solution. Any sort of container with a pin hole will drip water for a few a days. Bee Keepers do the same thing to supply water/sugar for bees. But I digress. I have all the parts, off a home depot shelf, to set up a battery powered timer that is on/off for soaker hoses. Currently the soaker hoses are run to my houses water, but the plan is to hook the hoses through the timer to rain barrels on the side of the house. I'm a homebrewer, which means I'm a cheap bastard. I'm not paying the city for water if I don't have to! All the trenches are dug, all the materials are bought, I just have to put it together.
I think a battery powered on/off bought at a home improvement store controling a soaker hose would be a step up from a drip container system. Both are affordable.