ORIGINAL: Gretchen Ott
I just resumed my quest for an Ott Dairy milk bottle and found your post. My grandfather owned Ott Dairy in Cleveland (I have a photo somewhere of my dad and his four brothers delivering milk). My grandfather, Frederick Ott, married Eva Geneva Telling, and my cousin tells me that the Telling Bell Vernon Milk Co. bought Ott Dairy. So that might explain the Telling-Ott bottle.
Sealtest bought them out and for years they maintained the name Telling in one of their ice cream varieties.