APPEARANCE

Skin-like texture
Hirokazu, S., Yoshimune, N., & Takashi M. (2006). Realization of Human Skin-like Texture by Emulating Surface Shape Pattern and Elastic Structure http://www.maeno.mech.keio.ac.jp/paper/haptics_sympo2006_shiraoh.pdf

Provides models of the surface shape pattern and the elastic structure of human skin, and we can make use of those physical factors and multilayer design into our hugger’s “skin layer” . 
  What should be the hugger's look
Hug Salt And Pepper Shakers
Alberto Mantilla, 2002 

Functional and charming, the two identically-formed porcelain characters appear to affectionately embrace. The black pepper shaker has two holes and the white salt shaker has three.