The Extra-Large 750ml inserts were developed in response to a California boutique winemakers concern that our normal 750ml inserts would not accommodate his extra-large California cab bottlesand he was correct, they wouldnt. He provided us with 9 of the bottles he uses and we forwarded them to our manufacturer in Shanghai. From there our extra-large 750ml inserts were developed. The suitcase can accommodate four of these size bottles per side (for a total of eight bottles per case).