Isn't a 'frog juicer' a small appliance that sits next to your Bass-o-matic76 on the kitchen counter?
PS- WARNING- if you are too young to know what a bass-o-matic does, or have a weak stomach, or have never cleaned a fish, you probably should not watch. This is an almost 50 year old clip, from the days when SNL was funny. Younger folks will be watching and saying 'Oh, no! Those poor bass!'
But seriously, like any other fancy bit of technology- use a frog juicer when it solves a problem for you. If you don't have a problem that it solves, you don't need one.