The promotion runs until August 31, and other prizes include three-month memberships to the Gourmet Society.
The push aims to communicate the brand's positioning of "a culture of celebration" and "affordable luxury".
Marqués de Monistrol's 2006 vintage – widely recognised as an excellent vintage for cava – is to reach shop floors by the end of June.
The brand has reported 11% sales growth to £17 million in the year to April, according to Nielsen, as well as a year-on-year volume rise of 1% to 272,000 9-litre cases. Its average unit price has risen by 45p to £5.21.