A tray of small glasses collected about half of a medium sized preserving jar full of rainwater after one hour (about 300 - 400
I'd also put a bowl under ml), this morning. Six large containers collected a quarter of a standard sized bucket (around 1750 ml) over the same time period. However...
I'd also placed a wide bowl beneath a little drip from a clip in the middle of a small shed roof and this filled, allowing me to fill the blue bucket completely to the top. This then filled a 10 litre water container - enough for 40 glasses of water.
