The brand identity includes a new logotype and bottle shape and will be rolled out across all of Zagorka's range and marketing activities including advertising and point of sale materials.
The bottle has a longer neck and height to make it appear more elegant, an embossed sign on its "shoulders" to outline its identity, and a well-defined base.
SiebertHead preserved the brand's colours of white, red and green on the label but completely redesigned the logotype to emphasise the premium perception and the brand's "stylishness".
Zagorka consumers were involved in the design and development process to ensure their views for the brand were fully taken into account.
The new returnable bottle is lighter than the previous bottle so over the production run of more than 20m bottles, a significant saving is made in glass and energy costs.
Tim Corvin, managing director of SiebertHead, said: "We were briefed that the bottle shape must be contemporary and elegant, as well as differentiating. Following our own research into various aspects of Bulgarian life, we created a bottle that takes the form of a taller, longer neck bottle normally associated with premium international beer brands.
"The design is made unique by its broad rounded shoulders, reminiscent of Bulgarian architecture, and a tapered body raised on a plinth to create a uniquely proud presentation for the brand."