These clear phones were made in a variety of color combos, and sold under a variety of brands: Unisonic, Conairphone, Lonestar, RadioShack, BellSouth, etc.
Most of these had little Christmas-tree light bulbs inside that flashed orange when the phone rang.
Conair and BellSouth also sold matching see-thru answering machines. The BellSouth one was called the “Memento 9000,” and is shown in the third-to-last photo. I picked one of these up NOS on eBay about a year ago. The Conair one is shown in the second-to-last photo, and is pictured much better back in post #29; it was part of their “Neon Brights” series.