The Hoffman's were from Franklin Square and Elmont in Long Island NY and I actually go visit his grave often at St Boniface in Elmont since the entire cemetery is literally filled up with all of my relatives.
The main bottling plant was in Newark, NJ. Heres a link with some hoffman bottles pictured, http://njbottles.com/index.php/topic,1578.msg5052.html#msg5052 The company was probably most famous for the bottle shaped water tower in Newark. The building is gone but I believe parts of the water tower survived.
Here's a photo of it. Below is what it looked like when it was first installed.