It seems like a silly little problem, but having a stable, non-leaky water dripping bottle/container w/ adjustable height has actually been difficult for me to come up with.
I have a small plastic bottle with a small diameter nipple on it, which accepts a piece of plastic tubing perfectly and I've attached a small aquarium valve to regulate the flow. Of course the bottle leaks from the threads on the lid, causing double drips and disruptions in the tray of water below. I have it hanging from a string basically, so it's easy enough to raise and lower, but this means it's also able to twist and swing back and forth- causing me to have to re-check the focus point repeatedly. So.....the only part that's reliable so far is the valve!
Someone has probably got this solved and I'm sure it will be a DOH! moment for me but I'd appreciate any ideas you have. Thanks.

