“Sip sip hooray” (sip + hip hip hooray)

“Sip sip hooray” (sip + hip hip hooray) is a drinking saying that has been printed on many images. “Sip, sip hooray!” has been cited in print since at least 1913. “Sip! Sip! Hurrah!” has been cited in print since at least 1928.
 
     
Wikipedia: Hip hip hooray
Hip hip hooray (also hippity hip hooray; Hooray may also be spelled and pronounced hoorah, hurrah, hurray etc.) is a cheer called out to express congratulation toward someone or something, in the English speaking world and elsewhere.
       
21 September 1913, San Francisco (CA) Sunday Examiner, “A Few Minutes With Harry Breen,” City Life sec., pg. 2, col. 6:
Now, dear father won’t have to SIP, SIP, HOORAY!
 
16 March 1928, Capital Journal (Salem, OR), “Good Evening: Sips for Supper” by Don Upjohn, pg. 1, col. 2:
We hear the Gervais Girls’ Admiration Association has a new yell—
It goes like this—
Sip! Sip! Hurrah!
 
9 September 1928, Sunday World-Hera;d (Omaha, NE), “Over Here” by Erick, Magazine sec., pg. 12, col. 1:
If the wets want a slogan what’s the matter with “Sip, Sip, Hooray!”
 
20 July 1934, Detroit (MI) Evening Times, pg. 19, col. 2 ad:
“Home, dripping. drooling and thirsting! A long tall drink awaits, m’lud! Ah! What a girl—what a pal! A big, easy chair and Sip! Sip! Hurrah!
(Old Mr. Boston Distilled Dry Gin.—ed.)
 
Google Books
March 1939, Good Housekeeping (New York, NY), pg. 120, col. 1 ad: 
Sip-sip hooray!
(Heinz Chicken Noodle Coup.—ed.)
 
11 March 1941, Hartford (CT) Daily Courant, pg. 17, col. 7 ad:
Gibson’s (Rye.—ed.)
“GREAT FROM THE 1ST SIP.”
SIP, SIP, HOORAY!
 
19 September 1944, Boston (MA) Daily Globe, pg. 15, col. 7 ad:
Sip, Sip, Hooray!
(Carstairs White Deal whiskey.—ed.)
 
Elite Daily
40 Wine Puns For Captions, To Give Your IG Feed A Taste Of The Good Life
BY JASMINE VAUGHN-HALL
JUNE 7 2018
(...)
8. “Sip, sip hooray.” — Unknown
 
Twitter
Katie Bonaccorso
@katieb1013
Check out what I just added to my closet on Poshmark: Old Navy - Sip Sip Hooray tank. https://poshmark.com/listing/5b8c9e306a0bb794ad3d8ac3?utm_campaign=referral_code%3DKATIEB1013&utm_content=feature%3Dsh_li__ios%26rfuid%3D556e194f74d7703bcf160cc6%26ext_trk%3Dbranch&utm_source=tw_sh … via @poshmarkapp #shopmycloset
9:51 PM - 10 Sep 2018