This mint condition cobalt blue Wyeth eye wash cup and bottle stopper has unusual embossing.  Very small lettering is spaced out by the mold lines, so on the front is

WY ETH and the back is CO LL YRI UM

It is 2 inches high with a 1.5-inch opening, clean, and free of cracks or chips.

Wyeth produced eye baths from about 1911 and this eye bath & closure is most likely from the 1920-30 period.

As always, carefully wrapped and promptly shipped USPS at a discounted rate! Thank you for looking!