To J's point. I have been using a semi commercial vac sealer (15" capacity) external type. Much more expensive than typical home external bag sealers @ about $350-400.
I've been using the pre freeze method for liquids without issue.
It is more expensive and less "counter friendly" than typical Tilia/FS style economy versions.
But it has all of the features in terms of being heavy duty, ability to repair and get parts, etc. Large bag capacities very high vacuum level, dual pump, fan cooled, 1/4 inch sealing strip. It's a continuous duty sealer.
Not a problem with it for over or about 3 years so far.
Nice thing with the 15" bar is that you can seal two smaller bags at the same time. Using roll bag stock you can virtually bag any size item you'll run into. Using the 15" roll stock I've bagged whole turkeys, cakes, sausages, whole hams, etc.
The value to me with this 15 inch sealer vs the chamber unit shown is that you are not limited to the size of the chamber.
I've written about it before, so didn't want to bore folks with the same old posts. To mee it's a better value in that it's repairable and will outlast a number of the FS/Tilia brand models.
You can also do better buying mesh bags in quantity that buying FS bags at the big box stores when you shop around. This unit will also use the standard FS type bags though if you want. It has the external port for canisters and the like as well.
Regardless the chamber sealer shown is an awesome opportunity/price for someone looking for a commercial duty home size chamber sealer IMHO.
Here's the heavy duty 15" sealer I reference:
15" Sealer
Also sold under the Weston name:
Weston
You'll see a similar version sold by Cabela's and Basspro but those versions don't have the fan cooling which I think is a significant deficit.