Reddit mentions of Westinghouse Food Dehydrator, Beef Jerky Maker, Food Preservation Device, Food Dehydration Machine, Dried Fruits and Vegetables Maker, Countertop Small Kitchen Appliance, WFD101W, White

These are just dehydrated chicken meat

You can make them with https://www.amazon.com/dp/B0188X0UT6/ref=psdc_1090752_t3_B008H2OELY

Take the cheapest one dehydrator, and cut pieces of meat, put them on the tray, let it dry for 3 days at something like 104°F to keep all flavor of the meat.

edit, edited the amazon link for the cheapest one (have something similar and to be honest i'am pretty sure that in this price range they are all the same just with a different brand, already have 2 years and still working, if the plastic basket start to crack, put fine mesh over it, just make sure it let airflow pass).

These thing are also not cheap when you look at the Kg price, make them yourself, in 3/4 package of treats you have payed off the dehydrator.

I used a dehydrator. We bought one a long time back to make treats for buns and I got the idea for making cilantro chips yesterday. I think you could use a regular oven too at the lowest heat setting.

Recipe: Take cilantro and make into a rough paste using a blender. Squeeze out the water and form it into tiny discs to dehydrate.

I saved the water and mixed it with the buns' weekly dose of critical care.

http://taulman3d.com/drying-materials.html is a nice, quick, cheap way to do this outside of an oven. I made one, works pretty well.

There was a product called PrintDry that came out on Kickstarter a while back, works well but expensive and you can make your own for cheap. http://www.printdry.com/product/filament-dryer is the product, https://www.thingiverse.com/thing:1618037 is instructions on how to make your own for half the cost. Basically just a food dehydrator and a plastic bin, plus a few printed parts. https://www.amazon.com/Westinghouse-WFD101W-Dehydrator-Watts-Stackable/dp/B0188X0UT6/ is a $35 dehydrator that will work. I have the PrintDry, nothing special about the product or the company that makes it.

Try looking at recipes that could reasonably fit inside a metal insulated wide-mouth thermos. You'd be surprised at how frickin' long those things stay warm! My mother has one (she works nights, doing security) and brings a thermos of coffee with her. Hers also came with a white bowl that fits inside the lid of the thermos! They have camping equivalents built specifically for food, if you don't need such a large thermos. Shop around. They really do stay hot for 24 hours - I remember my mother brought a thermos full of coffee, and the next day it was still piping hot.

For ideas that you could fit in thermoses - you can make vegetable chilli, soups, stews, small noodle dishes like macaroni and cheese (or even spaghetti if you use penne or another noodle.) Tons of stuff! To get it 100% clean, use a toilet brush like this one as typical bottle brushes are too soft and sometimes too small.

You could purchase a food dehydrator as well and make a large assortment of dried meats for your dad to take with him for protein - anything from turkey, bacon and beef to squirrel, rabbit, and deer. You could also dry fruit and vegetables in those things.