Leaving Phnom Penh, I flew on Singapore Airlines to Singapore where I switched to United Airlines. I was surprised when Singapore Airlines served a meal using no metal or plastic utensils or dishes. It was the usual full meal but the utensils were bamboo and the containers were cardboard. It seems it’s probably good environmental practice and I suspect it’s cheaper also. On this trip Eva Airlines and United also used the bamboo knives, forks, and spoons.