For my medical kit, pelican. For tools ammo boxes are pretty robust, waterproof and cheap.

But it’s a Yeti, lol!

You guys know that a comparable size Pelican box costs as much as that Yeti, right?

Ammo cans do good, just need to be aware of rust and take care of as it happens. Pelican cases are good.

Plano is crap, they will not keep moisture out and their customer service sucks. There are YouTube videos on them and I tried the pool test. Metal ammo cans 100% no bubbles or water inside. Plano boxes, you will see bubbles and find water inside after submerged.

Yeah pelican tool box!!
comes in black yellow or orange
very nice, a bit heavy when loaded
but it’s my oh shit/mcgyver box so a little bit of
everything in it so far even left on deck in rain
no water and no rust!!

I use these and have never had a problem. I’m hard on my boat and my gear. In fact, my box has ended up in the water on 2 different situations and everything was good to go.

You have gotten some good suggestions here despite the fact that some don’t fit the specifics of your original question...more detail would be helpful from you...what size boat? Where will you store the boxes? (These will help answer some of the next questions but...) What tools exactly do you want to store in the tool box? What exactly do you want in the safety box?

For my 15’ skiff, I went to harbor freight and built my boat tool box for less than $50. One of their “weatherproof” ammo cans (plastic with a small gasket), poly type socket wrenches, sockets, aluminum multi-screwdriver, various pliers and channel locks, and a can of oil to keep everything lubricated and resist rust. Bought an identical can for flares, paperwork, etc.

If you want flares and a whistle in the safety box thats one thing, if you want an Epirb and liferaft to fit in it, thats another...