I used to think those were all eye water bottles but now I'm thinking it was a more general symbol used by Philadelphia druggists. Still dont know for sure.
I HAVE A EYE WASH CUP THAT HAS A STEM AND BOTTOM SORTA LIKE A LITTLE CHAMPAGIN GLSS. IT IS COBALT. ON THE BOTTOM IS EMBOSSED "ELDER-FLOWER LOTION CO." HAS AN EMBOSSED EYE AND EYE LASHES ,LIKE THE BOTTLE ON HERE.I WOULD GUESS SINCE THE ELDER-LOTION CO. HAD A EYE WASH CUP IT WOULD STAND TO REASON THEY ALSO HAD AN EYE WASH BOTTLE. WILL PUT A PIC. ON LATER. JAMIE