I recently read The Mote in God's Eye and in it one of the alien ambassadors describes how delicate the negotiations were by saying "we juggle priceless eggs in variable gravity"
I believe that I did something even more liable to spillage.
The Martini, served in the iconic conical glass is the most spillable drink. I carried a Martini up a spiral staircase. The spiral staircase was on a cruise ship which was pitching and rolling in a gale. The spiral staircase was well above the roll centre of the ship. It was dark outside, the curtains were all closed and there was no visual reference for the horizon. I had to use nothing but my sense of balance and movement and they were both impaired by the alcohol already in my system messing up the density of the fluid in my inner ears.
Richard "on the gripping hand" B