Here’s a puzzle I’m trying to understand.

On the TWS website, there’s a link that says “Boizel Champagne Save up to £78 – if you’re quick!”

Click on it, and it reveals you can get Champagne Boizel Brut Réserve NV reduced from £210 for six to £150 for six - a saving of £60 (the £78 saving is for the rose version).

There’s nothing too puzzling there. But what puzzles me is this…

If you search the TWS website for “Boizel” you find that halves and magnums of this Champagne are available. And what’s strange is that they apparently cost less than regular bottles. Here are the prices:

Bottles: £210 for six (now reduced to £150)

Magnums: £195 for three

Halves: £192 for 12

My understanding was that you always paid a slight premium for halves and magnums (relative to the amount of wine) - for halves in particular there’s more glass and cork and work involved.

So it’s a puzzle to me - why at original price would the regular bottles have cost more than the halves relative to the volume of wine?