[cycomanic]

As a current parent, I can not envision a situation where it is not possible to put down a child in order to open a rubbish bin with two hands.

I mean there are lots of other situations that occur regularly which require you to put a child you're carrying somewhere else. I mean how do you think parents of more than one child manage?

[dmix]

Or we can just designed one handed garbage bins which require thumbs.