Larry is a man after my own heart.
He goes even further than I , using soup and soda cans for his reservoirs.
My recipe is to invert a 3 gallon icing
bucket, cut off the rim, cut slots in the bottom,plop it into a 5 gallon bucket,add wicking soil.
For reservoirs in 55 gallon drums, do the same, with a mixture of 5 and 3 gallon buckets.
To have the benefits of a reservoir and still give plants access to the rest of the soil, build a bottomless
raised bed, place completed wicking beds inside and fill the rest of the bed with wicking soil.
The bed will draw water from the reservoir and the
roots of the plants will be free to dive deep into the earth.