What about Crystal Lite? I sent him a package of that and some beef jerky today. (I know, the combination is not great, but if he can handle MRE's, he can handle that.)
Crystal Lite is great, manna! And Eric likes beef jerky a lot, so the combination is just fine!
They're getting one hot meal a day, and two MRE's, so anything to break up the monotony is wonderful!
Thanks so much for thinking of him!