I open but I'm not a door, I close but I'm not done, I hold your secrets inside, Two arms, but only one hug.

I blink and I waver, I struggle to stay, I warn of the darkness that’s coming your way.

I have a heart of iron and a handle of wood, I dig through the earth as a sturdy tool should. I turn up the soil, though I plant nothing green, And bury what’s hidden beneath what is seen. What am I?

Don't air me out when I'm dirty!

I survey messages over the sea I contain spirits or water or pee I may be a weapon like a grenade Hold me and I hold your gatorade