What do buskers who post here use for collecting tips?

Where do you locate it? On the ground in front of you? In an open instrument case?

How do you secure your container? is it chained or tied to something, or out loose in the open?

I use a metal bucket shaped like a milk can. It was originally designed to be decorative, maybe a small planter or some such. So far I've never had anyone bother it out on the ground in front of me, but today in a busy city downtown, I noticed a couple of people eyeing it.

Wondering if anyone has recommendations.