I use these for sparkling mead which like champagne will require bottles to take 6-7 ATMs pressure or 90 PSI.

The bottles I received are flat bottomed.

The batch that I received are punted. They also hold high carbonation very well!

Standard beer bottle bottom- slight curve to it. Not punted like a wine bottle.

Flat

They’re flat.

Flat

Expand the puc you can see the punt we'll made and ready for high carbonation

Punted bottoms.

The bottoms are flat. At least the ones I bought were. The bottles are heavy and high quality. The only thing I struggled with is fitting them in my floor corker with the capper attachment because they are so tall. But they are really nice bottles.

The box has Made in Taiwan on the bottom. I’ve bought these twice and used corks and cages both times. They are not made to a standard crown size diameter if you were wanting to cap the caps never crimp completely. Corks will work with these but occasionally you might find a neck that is a little tight.

Hello - This product has a PO created however it has yet to be confirmed. It will likely be a at least two more months.

No. You can use a hand capper.

I capped them with a handheld one but it was hard work.

I happen to use a bench style capper on all my bottles but have used other styles in the past. Although ymmv these cap like any regular beer bottle with regular (26mm) caps.

No I'm using a hand capper (Emily bottle capper) that allows to swap the blades for wider necks.

I use the same capper as I do for my 12 oz bottles (for beer). I don’t know for certain but it may be possible to use corks.

Not necessarily. if you have the Hand/Emily capper you can take a pair of needle-nose pliers and pull out/reverse the metal jaws. Hope that helps.

You can use one of the handheld cappers (red swing type) presuming they have the reversible plates. You'll want to look at the metal parts in the bottom part that grabs the neck of the bottle. They can be difficult to get out but they should be reversible for larger necks. Since they are cheap I have two one set for each style so I can switch back and forth easily in the same bottling run between bottle styles.

No they don't. And in fact I have had much better capping experiences using a hand capper with these bottles. Every hand capper's metal neck grips (I'm sure there's a technical name for those pieces) can be reversed to accommodate the bigger lip on the bottle.

Yes Bench Capper is required.

I was not able to cork these bottles using a floor corker. The diameter of the throat is slightly smaller than most other Belgian bottles. I discussed this with the More Beer reps and they did their own trial. They were able to cork. Perhaps a slight difference in cork size or density. Another precaution: you can not get a tight fit capping these with a hand capper. You need to use a capper attachment to a floor corker. I really like the bottles but they are unusual and perhaps not fully as advertised.

Yes sir. We’ve done both capped and corked. Both worked great.

I bought a case of these recently and corked an Houblon Chouffe-like Belgian. I corked/caged (real corks) with a Portuguese corker and carbonated to 4.5 volumes with no issues. Hope this helps!

Yes. They take standard champagne cages and champagne/Belgian style corks. I have a lovely Saison sitting in these bottles (corked and caged) sitting real pretty at 4.25 vol c02

They are pretty thick. I have targeted 3 vols. in some of my Belgian beers and those bottles performed very well. If you have ever gotten Mumm champagne those bottles are very similar if not the same.

I did 2.7 on a saison in them without a hitch. I’m guessing they could handle far more. They are fairly thick.

According to a document I found from another online retailer of brewing supplies a 750ml champagne bottle should go up too about 7 vols. That said I can't even imagine a beer with that level of co2. I recently bottle-conditioned a saison that was around 3.5 vols using these bottles. It was very highly carbonated and these bottles had no problem whatsoever.

If you mean pressure volume I would think more than you would want to put in it.

750ml is about 25oz. Which is just over 1.5 US pints. So 12 bottles holds about 18+ pints.

I have SEVERELY over-carbed a Belgian strong ale on accident and these bottles were able to handle it with no problems. These are thick like a sparkling wine bottle.