I just picked up a tub of Lavender TOBS and judging by the training video on how to work up a lather using Shaving Cream I could imagine a tub would last someone a couple of months anyway, right?
For me, shaving both my face and head, similar sized tubs/tubes would last a solid two months if used every day. This includes Creighton creams, which are all very similar with the exception of Trumper's IMHO. YMMV
If your looking for a huge tub of shaving cream thats really pretty good and about the same price as TOBS try JM frasiers regular. Its a very good cream and its like twice the size.
One would think huh? It really is a very good, underrated cream with a nice citrus scent. J.M, Fraser's Reviews
I get 3 months from a tub of TOBS, based on shaving daily. But it will depend on how efficient or wasteful you are. I get three passes for each shave. This is based on 6 shaves per week. St. Croix