The Smithsonian National Atomic Testing Museum in Las Vegas had an extensive exhibit on the Fallout franchise including full sized mock ups of the in-game vault rooms. This is an official Bethesda display.

The gift shop also had Vault tech merch items when I was there in November.

Given Bethesda's track record with promotional bags, you probably bought the higher-quality item.

Is this one actually made of canvas?

Cough cough where? Cough