This aged tequila by the brand Espolon comes in bottles that are somber for more reasons than their jet black color.
The bottles are meant to look as ominous as possible with their black color, matte finish and white illustrations of skeletons in a graveyard. The graveyard theme is likely referencing the aging process that the tequila goes through during its production. Unlike the brand's other bottles, this specific tequila is aged for six years before being sold. This gives it more complex flavors that would likely be enjoyed by people who like the Mexican alcohol.
The branding of this aged tequila works to capture the attention of alcohol lovers long enough for them to realize how long this tequila has spent developing its flavors.