Cobalt blue sea glass is one of the most sought after colors. It is considered quite rare to find especially on certain coasts.

This factor has everything to do with bottle manufacturing history. Much of the time, cobalt blue sea glass pieces often originate from vintage pharmaceutical bottles, like the old Noxema, Bromo Seltzer, Vic's bottles and even medicinals.

This fabulous, antique, embossed poison bottle features a lovely weave pattern and a stopper at top that reads "POISON".