I use the IBTanked Pyrex
tanks on my Provari's. I generally wear cargo pants with the larger pockets and carry them in there when I'm not actually holding it in my hand, which is most of the time.

Mine have fallen from my lap getting out of the car more times than I am willing to say, and not one has cracked or shattered when hitting the driveway.

There are more durable
tank options than a pyrex tank though. Check out the Big Daddy cartotanks from
Big Daddy Vapor. Anodized aluminum with a small window to see your juice level. Pretty tough tanks.
If you're more into the clearo tanks, check out the
Tatroe Mods stainless steel tanks which use the Kanger Evod replacement coils. These are a heavy SS with no juice window. They look indestructable.

Big Daddy cartotank