To expand on a Conversation, had the other night...
and then had at Grammy's work, with her 'people'...
Making a list, of Specific Brand Names that people commonly use to generically cover an entire group.
"Do you have a Kleenex?"
Kleenex is actually a Brand Name. There are several different types of facial 'tissues'.
The List... 'Thus Far':
White Out or Liquid Paper
("Do you have any Tylenol?" when you may really want Advil...etc.)
Xerox (copy machine)
("I Googled.." When you used Yahoo or Ask.com)
Vaseline (Petroleum Jelly)
Crock-Pot (slow cooker)
Ping Pong (table tennis)
Ok, feel free to expand!