Vintage Glass Nursmatic InstaValve Nurser … SHOCK POOF … THERMOGLAS.  Baby Bottle with One Yellow Cap with Black Top and One Black Cap with Black top

Vintage glass baby bottle from the 1950s.
Nursmatic Instavalve Nurser, 8 oz and 4 oz.
Clear glass with bright blue printing.
Embossed into the glass on the bottom: "Nurs Matic Corp, Crystal lake".  USA