I have several double mags, but have not opened any yet. Not sure why I bought them, perhaps the novelty of the size; I don’t usually have the opportunity to open that much wine in one sitting, especially of one wine.
I had a 3L of 2005 Trinitas PS. And then I broke it moving my wine around. 
Had a 6 liter that we opened for a birthday. It was a pain in the arse. Wound up using a siphon to get the wine into decanters just to pour glasses for everybody. And getting the cork out, that took a half hour and some ingenuity.
9L of 78 Beringer private reserve…was fantastic!
I’ve got a bunch of magnums of stuff, mostly Rhone, OR PN, Mosel riesling, etc. A few 3L’s of Burgundy, Bordeaux, and CA Cab. Nothing too noteworthy though. I decided in 2014 to buy a handful of Champagne 3L’s, as at big parties we often find ourselves going through at least that many bottles.
Just so I’m invited!
That sounds like fun! I have a couple of these as well, did you get yours at Costco recently? I did - $45!
9 liter 01 Pegau. Still have it
Lots of mags, I think I bought as much wine in magnum as in bottle last year.
A few 6l bottles, but nothing too fancy. We enjoyed a 6l of Grand Village 2007 last summer between ten adults with only a little left over for the next day.
6l of 02 Duckhorn Howell mnt merlot…
I was going to get a 3l while it was on sale for cheap at the winery during the holidays and I dropped a good ole fashioned “FI” and figured I had enough friends that a 6r was all good when I’m ready to pop it.
p.s. F.I stands for “f*ck it”.
P.p.s. I actually prefer magnums though, so a 1.5 or 3l is no biggie in my cellar.
Wow! Great list! I have a hard time imagining the size of the party necessary to crank through a 3L of Yquem, or any sweet for that matter. I often look at my 750’s and wonder “what am I going to do with these”:).
Cheers,
Jim
6 liter bottle of 2005 RRR (Ravenswood, Ridge, Rosenblum) Really Big Zin acquired at ZAP before I quit going to that event.
6.0L’s of 1996 Laurel Glen, 2005 Karl Lawrence Cabernet, 2005 Raymond Generations and 2007 Raymond Generations. I have 25+ 3.0L’s from various producers and a few hundred magnums.
Love the big bottles, especially this time of year! 
Only one. A 3L 2003 Pavie Macquin.
Bunch of 6L of 1996 Faiveley Clos des Corton, other than that all mags.
Not that big: 3l of Lafite 1983
3 l of 86 Ramonet Montrachet, too expensive to keep. Now just 3 l of a couple vintages of Clos des Lambrays.
I do like the big bottles. They’re fun to look at, fun to open (you do need a bunch of people). Just good fun…
6L
2000 Angelus
1995 Angelus
1980 BV
1988 Chapoutier ‘Barbe Rac’
1987 Mondavi ‘Reserve’
1996 Ducru B
2005 Lambrays ‘CD Lambrays’
1995 LLC
2005 Malescot st. Exupery
1990 Margaux
2005 Marojallia
2003 Montrose
2005 Pavie Decesse
2005 Pavie
2003 Pavie
1996 Pichon Lalande
1982 Pichon Lalande
2000 Pichon Baron
1996 Pichon Baron
1998 Quinault l’Enclos
1998 Valandraud
1998 Vieux Telegraphe
2003 d’Yquem
5L
1995 La Fleur Petrus
1989 Margaux
3L
2000 Angelus
2002 Arnoux ‘Reignots’
2005 Bellevue Mondotte
2009 Boillot ‘Batard Mont’
2009 Boillot ‘Corton Charlie’
2009 Boillot 'Pucelles
2003 Clos des Papes
2006 Monfortino
1999 Monfortino
2003 Cos d’Est
1982 Cos d’Est
1989 Ducru
2005 Evangile
2005 Peby Faugeres
2000 Giacosa 'Rocche
1998 Haut Brion
2002 Jadot ‘Chambertin Beze’
2002 Jadot ‘Amoureuses’
2005 La Miss
1998 La Mondotte
1999 Lamarche ‘Grand Rue’
2005 Larcis Ducasse
2005 Lascombes
2003 Latour
2003 Leoville LC
2003 Leoville P
1990 Margaux
2003 Montrose
2003 Pavie Decesse
2005 Pavie
2003 Pavie
2000 Pegau ‘Capo’
2003 Pegau reserve
2005 Perrot Minot ‘Chambertin Beze’
2006 Perrot Minot ‘Combe d’Orveaux’ ultra
2005 Perrot Minot ‘Mazo Chamb’
2005 Tertre Roteboeuf
1995 Tertre Roteboeuf
2005 Trotanoy
1998 Vieux CC
1983 d’Yquem
To add on, how many people do you feel are necessary/ideal for each size to consume?
1,5L
3,0L
6,0L