Writing coffee with the "coffee cup stains" is nice. The original stain that makes the "C" was probably enlarged to create the "f", overlaid to create the "e". The nice brown color that remind us of real coffee stain.
The creator of these logos has used a unique approach to typography. By playing with and arranging letters, very creative logos were formed. These simple, yet interesting logos are an example of the power that typography can have in design.