I did like cycling lady, I got a meal prep lunch box with cooling block. I can keep 2-3 meals in the small one. They make a large one that can keep 5 meals in them for traveling. Just move the reusable containers to fridge on arrival...
As far as gluten is concerned, I have never seen a cleaning product that contained gluten. You can usually google Material Safety Data sheets even on a simple item like kitchen cleanser where manufacturers are not required to list ...
This is very interesting, mushrooms have been hit and miss for me with years. Canned Straw Mushrooms from Polar NEVER bother me, fresh ones are like playing russian roulette. I had luck for several months not getting sick with them ...