Lucite one piece fish salt and pepper shaker
These types of sets can be found by typing "lucite" into the search of the club's shaker database. Most are one piece salt and pepper shakers.
Lucite, also known as acrylic glass, is a type of transparent thermoplastic material known as polymethyl methacrylate (PMMA).
Polymethyl methacrylate (PMMA) is composed of three primary elements: carbon (C), hydrogen (H), and oxygen (O). Its chemical formula is (C5O2H8)n, where "n" represents the number of repeating units in the polymer chain.
Many different versions of fish can be found drilled into one piece lucite shakers.  This gives the set a kind of fish tank look.  The sets are usually small (<3'' tall) and date from the 1960s-70s.  See below for additional examples.
Lucite one piece fish salt and pepper shaker
Lucite one piece fish salt and pepper shaker
Lucite one piece fish salt and pepper shaker
Lucite one piece fish salt and pepper shaker