Is it enough?

Tomorrow I have four friends coming to stay, three of whom I've known since we were students at King's College Hospital. One of them is partial to a drop or two of Listel, so imagine her joy when I found that 5 litre boxes are now available, and not only that, but they were on special offer and cheaper than the 3 litre boxes!!!
As you can see I've stocked up, but will it be enough?