Featured Age of this Chinese Food/Wine pot ?

Just found this Chinese (i'm guessin ?) food/wine pot at a garage sale.It's 8 3/4" inches tall,the pot's mouth is 3 1/4" inches across.I figure this form of vessel was used for many years,but any guesses re it's age are welcome.
I'd guess subtleties of form,clay type & manufacture are the only way to guess on age.
Thanks !

 

Something about the bottom, both inside an' out, suggests inserted to me. I am not very familiar with Asian pottery, Bosko...a pinch of salt may be useful here.
I like the color, collar, an' glaze...Sweet find!

 

Thanks a bunch Whit.These old commonplace shape & forms they've used for centuries are some of my favorite examples of Folk Art.
PS-By 'inserted' do you mean molded,or inserted into a wood/charcoal fire-like Raku ?

 

What I think I see is a ~circular slab of clay that has been placed into the lower end of an open-both-ends vessel-in-work. Look at pic 3, from ~6 o'clock 'round to roughly 10...an' perhaps even to 12. There's a curved line, an'
I can't figure what else would cause that feature.
Also, pics 4 & 5 show the flat bottom as slightly D-shaped, 'tho there is no interior delineation as obvious as the exterior seems to show.
These are a clay-dummy's observations, not to be given much weight, y'know?