As lpoopcars said, there was a Groupon sweep:
Nestle Waters ArrowHead Brand Go Local with Groupon Sweepstakes Enter to win (625) Grand Prizes: A $50 Groupon gift certificate Approximate Retail Value (�ARV�): $50
(750) First Prizes: A $25 Groupon gift certificate. ARV: $25.
[TABLE="class: table table-bordered"]
[TR]
[TH]Restrictions [/TH]
[TD]18+ US [/TD]
[/TR]
[TR]
[TH]Limit [/TH]
[TD]1 Per Person / Per Day [/TD]
[/TR]
[TR]
[TH]Added [/TH]
[TD]2016-03-08 [/TD]
[/TR]
[TR]
[TH]Expired [/TH]
[TD]04-15-2016 11:59 PM EST [/TD]
[/TR]
[TR]
[TH]Hits [/TH]
[TD]4241 [/TD]
[/TR]
[TR]
[TH]Category [/TH]
[TD]
Daily
[/TD]
[/TR]
[/TABLE]
There was also this one, which was listed for several states:
Arrowhead Brand Fresh Beats Sweepstakes One Hundred Eighty (180) prize winners will each receive a code redeemable for twelve (12) months of Spotify® Premium (each a “Digital Code”). The Digital Code must be redeemed at
Spotify no later than June 1, 2017.
Approximate Retail Value (“ARV”) of each Prize: $120.
[TABLE="class: table table-bordered"]
[TR]
[TH]Restrictions [/TH]
[TD]18+ AZ, CA, CO, ID, MT, NM, OR, UT, WA or WY [/TD]
[/TR]
[TR]
[TH]Limit [/TH]
[TD]1 Per Person / Per Day [/TD]
[/TR]
[TR]
[TH]Added [/TH]
[TD]2016-06-07 [/TD]
[/TR]
[TR]
[TH]Expired [/TH]
[TD]07-03-2016 11:59 PM EST [/TD]
[/TR]
[/TABLE]