Metal water bottles and airport security
I'd like to carry an empty bottle for refilling after security and then each morning of my upcoming trip to Europe. My preference right now might be to take a stainless Klean Kanteen, although a Sigg or Matterhorn aluminum bottle is a similar option as well. Do any of you frequent (or infrequent) travelers have experience taking an empty metal (please specify stainless, alumium, or other) bottle through security? Inside bag? Attached to outside of bag? Loose in a bin with shoes, 3-1-1, etc? If so, were you asked about it? Was your bag identified for a hand inspection? Did it otherwise cause any sort of hassle for you?
I'm worried that a not-insubstantial metal cylinder would lead to further inspection and delays getting through security. Are my worries unfounded? I want to know generally, but for this trip specifically, I'll be going through some form of security at ATL, AMS, and MUC.
EDITED TO ADD: I do know that TSA, at least, explicitly allows empty metal water bottles. I'm more wondering whether having one is going to trigger a hand inspection or otherwise slow my screening process.