What is the feature called in new made garbage disposer have now a days, which turns on only when you put a cap or a cover kind of thing on the kitchen sink. Not the old fashion way which is unsecure too to have a switch to turn on... which grind even your hand... I am in market to buy one but don't know what that feature called.

I think they are called "batch feed".

And you'd be correct Flossie!
Boss, For a selection of 30 batch feed disposals to choose from click on,
Batch feed garbage disposal Plumbing Supplies at BizRate - Shop online for Home & Garden (http://www.bizrate.com/plumbingsupplies/products__keyword--batch+feed+garbage+disposal.html)
Good luck, Tom

:D Not bad for the dental expert, eh??

A lot better then I'd be on your page, Tom

Thanks! I got Batch Feeder from Home depot.

It was a great help!

We're glad you're all fixed up. If we can ever be of service in the future just ask. Tom