This harks back to the chafing dish type I shared a bit at http://favoritefoodthisweek.blogspot.com/search/label/chafing%20dishes ....
That long metal food-warmer with spirit lamps...whereon porridge, coffee, and hot dishes can be kept palatable is a great help....[Also] insist on...a small saucepan over a spirit lamp for boiling eggs.