http://www.tipjar.net/

I've thought of using that but I find that having a person put the money in my hand gets more tips.

I've talked to a twister who uses that very tip jar but has it attached to a larger glass container. He said that kids put in coins to hear the bells and see the lights. So he has a lot of coins but we're after dollars not quarters.

But I do like the look and feel of it.

I'd like to find one like that with a bill feeder. Ickle Pickle put out a neat (though poorly executed) prop that had a bill feeder that, when the bill was fed, made it look like it was going through a shredder. It wasn't too expensive, so I don't think it would be hard for someone who knows what he's doing to make something where the bill feeder activating triggers some cool reactions, like a bell or a prerecorded audio. None-the-less, I've never seen something like it... has anyone else?