You know, I can't remember where my hard boil egg cooker is. Haven't seen it for years. It was so easy, you just put it in with the eggs and it would tell you at what point the eggs were soft boiled and hard boiled. It used to work great. I'll have to give it some thought as to where it might be. Can't say that I have seen them marketed anymore.
Regarding the bottle/water/peeling the egg thing: I just tried that and it worked great.
I usually pour the boiling water off and then add cold water from the faucet and as I am cooling the eggs, I shake the pot to crack the eggs. If I am in a big hurry and can't peel the eggs immediately, I add ice cubes to the bowl of water/eggs and put it in the fridge. Works like a charm. But, the egg in the bottle/water trick was really cool and peeled all the eggs in just minutes.
Thanks for the tip.