New users who registered between 13 June to 4 July may participate as well.
Greggs will be giving away a free bottle of Ribena to its Rewards programme members, an announcement revealed.
The reward will appear on the member accounts of 110,000 existing Greggs Rewards users and will be specified based on account activity in the weeks leading up to the giveaway. The offer is also available to new users who have registered between 13 June and 4 July.
Mechanics state that users must generate a code (9-digit or QR code) through the smartphone app and scan in shop.
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