So, it all fits. The Walkman, the cell phone, the water bottle are efforts to regain the warmth and comfort of infancy and find relief from the loneliness of adulthood. This need is surely not new. I remember the epigraph of James T. Farrell's book Studs Lonigan, which I read more than 60 years ago:
Alone and afraid,
In a world I never made.
Modern technology--the Walkman, the cell phone, and the plastic bottle--has given us new ways to try to deal with this old feeling. There are probably worse ways.