Makeshift egg cup
When camping, outdoor festival or in general the improvised breakfast after a night of celebration often egg cups missing, which usually leads to sticky mess on plates or clothes. What you often have in abundance in such cases are: Bottle caps of empty beer bottles. And exactly those give an impeccably stable egg cup? or rather: egg stand? from. Provided of course, the corks were not kinked when opening. Alcoholics can also use the plastic screw cap on their Coke bottle.
Traveling has helped me a lot with this little trick.
Alternatively, you can simply cut the egg packaging. Each "tray" results in an eggcup.