Most of the expanding foams are not waterproof or water resistant. You have to paint or caulk over them to prevent them from absorbing the water

If you are interested in woodworking there are 2 channels.

Stumpy Nubs – provides quick (usually < 15 min) how to videos on different techniques and tricks. He does a great job of explaining and demonstrating things

Bourbon Moth - a lot of full build videos (they tend to be > 30 minutes), but he does a great job of explaining the whole process from start to finish

I would recommend against skipping lunch. Instead, adjust what you bring for your meal based on weather. I just worked all day yesterday in the sun and heat. For lunch, I brought light, easily digested food that would replenish without making me feel sick.

Blueberries and strawberries are great because they have nutrients and moisture. Fruits and veg tend to digest well, even in the heat. Hard-boiled eggs sit well with me and provide some nice protein. I also like the flavored tuna pouches with a few crackers.

I avoid food with a lot of fat/grease or dairy. Neither digests for me well and dairy even makes me feel sick in the heat.

Thats really on whoever started saving them originally. Anything being saved like that should have a note attached stating why it is saved. I have some parts that need to be sent for repair and each of them has a note stating what is wrong, when it broke, and to contact me with questions.