“Tea is for mugs”

“Tea is for mugs” is a saying that has been printed on many mugs. “@GunstarCowboy no, tea is for mugs!” was cited on Twitter on September 3, 2009.
 
The pun jokes of the definitions of “mug” as “a large cup” and “a stupid or contemptible person” (such as one not smart enough to be drinking coffee).
   
 
Wiktionary: mug
Noun
mug ‎(plural mugs)
1. A large cup for hot liquids, usually having a handle and used without a saucer.
2. (slang) The face, often used deprecatingly.
3. (slang, vulgar) A gullible or easily-cheated person.
4. (Britain, slang) A stupid or contemptible person.
 
Twitter
James Jefferies
‏@jamesjefferies
@GunstarCowboy no, tea is for mugs!
3:56 AM - 3 Sep 2009
 
Twitter
Dan Clifford
‏@DanCliffordCTFC
Tea is for mugs.
7:02 PM - 16 Nov 2009
 
Twitter
Florian Stravock
‏@Xadacka
Tea is for mugs.
10:06 PM - 16 Nov 2009
     
Digital Forums
more one liners, some old some new some shit some nsfw
BIG-TED
18th November 2009
Tea is for mugs.
 
Google Books
Jokes for Blokes:
The Ultimate Book of Jokes not Suitable for Mixed Company
By Llewellyn Dowd and Phil McCracken
London: Ebury Press
2011
Pg. 251:
Tea is for mugs.
   
Google Books
The Mammoth Book of One-Liners
By Geoff Tibballs
London: Constable & Robinson Ltd
2012
Pg. ?:
Tea is for mugs, but coffee isn’t my cup of tea either.
 
Google Groups: alt.humor.puns
Tea!
Nemo
8/1/14
Tea is for mugs!!
 
Google Books
Dad Jokes 2
By Peter Crumpton
PeteyRF Creative
2015
Pg. ?:
Tea is for mugs.