I'm not sure how common it is, but it is a good looking bottle. Sam Fuller will probably know .
Anyway, it's a nice looking bottle, and I consider local pharmacy bottles pretty scarce as a general rule.
Here's what I found out about the Miller family from the four or five old directories I have.
(All Kennebunlport listings)
1871 -CE Miller "medicines and fancy goods"
1877 -CE Miller "medicines and fancy goods" also Charles E Miller "boots and shoes" also CE Miller- "Circulating Library"
1884 -CE Miller "apothecary and fancy goods" also Edward C Miller "apothecary" also Charles E Miller "boots and shoes" also CE Miller "newspapers,etc." also CE Miller "circulating library"
1898 -CE Miller "general stores" also EC Miller & CE Miller "apothecaries" also CE Miller "circulating library"
I also found out Edward C Miller first opened "Miller's Drugstore" in 1881.
His father , Charles Miller operated another drugstore across the street.
Charles sold his business in 1908.
Edward continued operating until 1954 when his son, Frank, retired.
Privvydigger, Glad to see another a K'port bottle ! I was able to pick up one on Ebay ! I and two prior generations have enjoyed our Summers in Kennebunkport. This is the only bottle that I have from the port !