Coffee cup stroke compensation

On Sunday night at the main stage it was cold and rainy, mid 50's. Besides a bathroom break I needed something warm and it was going to be coffee. The vendor didn't have a four pack carrier and I needed to get at least 3 coffees back to my friends. I'm wearing a supplex nylon long sleeve shirt with two bellows style pockets. I add cream and snap on the lids.
Notice the nice drinking hole. I put a cup in each pocket and manage to do that without ripping the lid off.I set off for the main stage seating with one cup in hand and trying to walk very smoothly. In about 30 yards my action of walking has swirled the coffee up thru the hole and down my pocket. Luckily the time it took for me to add cream and do all this preparation had cooled down the coffee to tolerable heat on my chest. I probably dumped a 1/4 cup of coffee out of each cup on the way there. Bret was able to pull the coffee cups out of the pockets without spilling all over me.
Much rehabilitation walking work is still needed for me to smooth out my walking.