film | Rollfilm 01x type 46-L 02

Polaroid also sold a fluid-filled plastic container called a "Dippit" as a companion product for Type 46/46-L film. The Dippit served a purpose similar to that of the print coaters supplied with the various B&W print films. After removing the transparency from the camera, you opened the end of the plastic Dippit box and inserted the transparency inside. Then, you'd seal the box again and invert it a couple of times to distribute the fixing/hardening agent all over the transparency. Then you pulled the transparency out through a squeegee device which removed the excess coating. Each Dippit contained enough agent for several rolls of film.
As an aid in using this film, Polaroid offered special clip-on viewfinder masks which matched the format of these slides. In fact, some cameras, such as the Model 150 and 800, came from the factory with built-in finder aids for this film (yep, that's what those funny pointy triangle things are in the 150/800 viewfinder window).
While this film was discontinued in 1964, you may encounter "Type 46" film boxes with considerably later expiration dates. What you're really seeing is Type 46-L film (below) after it was renamed to Type 46.