Said something sarcastic (about expecting no reanimation if she fell off a table) as I met her by coincidence and she bit back harsh and quite colorful.
Stumbled upon each other 6 month later and I recognized her. I shouted a greeting from afar - she thought it was another sarcastic remark, because she didn't hear it all and answered accordingly - I couldn't hear her clearly as well and took it as a greeting. Then we had a short talk which was very interesting and nice.
And that's that. Five years later, she still hasn't strangled me in my sleep. Perhaps it's the long game. Awsome person.
Go for a portable one. Be clean and proud. Nobody is gonna ask you about the flask-thing anyway unless they want one. https://www.happypo.de/ No idea if it has a translated site, but it's quite butt-forward anyhow.