How many units in a bottle of kopparberg cider?

Kopparber’s Pear cider is available in 500ml bottles / 330ml bottles / 4x330ml bottles / 4x500ml cans / 6x330ml cans / 12x330ml cans. Mixed fruit: 500ml bottles / 4x330ml bottles. Strawberry & Lime Cider: 500ml bottles / 4x330ml bottles. Elderflower & Lime Cider, Alcohol-Free Pear Cider, and Alcohol-Free Mixed Fruit Cider: 500ml bottles. Variants with alcohol have 4.5% ABV.