Vintage Rustic Earthenware Ceramic Mug

Vintage earthenware mug, cinched hourglass ⏳ shape and vertical textured panels with a glazed tones of brown and tan and beige. The inside of the mug is dark brown. There’s a bit of gloss to the glaze. No crazing. I believe it to be Korean made on a guess, but there are no marks. Small imperfection on the inside rim of the lip, refer to photos.