I recently had the idea that, instead of taping my bottles, and marking with a sharpie, it would be very handy to use something like a 'grease pencil' to mark up the bottle with the relevant info.
Unfortunately, black on brown, or even red on brown, doesn't seem to be very useful to me.
Does anybody know about something like this, in white, that could be used? I've tried a white crayon, without success. And I've heard of chalk markers, but they won't work when submerged in ice.