What's your favorite bedside music sketching device?

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You may well have seen this, but just in case … must be some overlap here ?

Favourite gear for Couch/Sofa/Lap

I’ve seen this subject discussed elsewhere but never a dedicated thread (at least, I couldn’t find one, mods please merge if I’m wrong). QUESTION: If you only have your lap to place gear, e.g. on the sofa, perhaps in the park on a bench, what’s your favourite gear in that situation ? Asking because I’m looking for useful tools for that situation. E.g. if I hear something musical on TV that interests me, the first thing I turn to is the nearest instrument to the sofa, which is always an instrum…