Haxwell Mouse Coffee and Good Mousekeeping are puns on Maxwell House Coffee and Good Housekeeping Magazine, both mainstays of the era.
In the days before conventional paper towels, fine rice paper was used on occasion, as Sniffles does here.
The sign off for radio station KFWB is heard. The station, based on Los Angeles, is still broadcasting today.
The NBC chimes can be heard several times during the radio broadcast.
Sniffles has Dartmouse and St. Rodent's pennants on his wall - plays on Dartmouth and probably St. Robert's.