Is it possible to copy data from one screen session to another?

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http://unix.stackexchange.com – I recently needed to copy X amount of lines from a file, that I opened in vim and then paste them to another file opened in a different screen session (and different server). So on screen #1 I ran in vim: :15,20y and on screen #2 I tried to use p to paste the lines, but I couldn't because the register was empty (to be honest, I was expecting that but I just wanted to give it a try). I eventually worked my way around in order to get those lines to the right place, but I wonder if it is possible to copy-paste data between screen sessions. (HowTos)