That is a species of Calvatia, you can tell by the all white color inside and out and I don't see any evidence of cap forming internally.
Calvatia are edibles.
As always, make sure you know absolutely (find a local mycologist or mushroom expert) before you eat one, When it comes to mushrooms you usually only get one chance and getting it wrong results in the long dirt nap.
Redhawk
List of Bryant RedHawk's Epic Soil Series Threads We love visitors, that's why we live in a secluded cabin deep in the woods. "Buzzard's Roost (Asnikiye Heca) Farm." Promoting permaculture to save our planet.