The two I ordered arrived today, until now I've been using mason jars w/ the packs with great success. I've been using the 60g in 1/2 gal jars and they really do last a long time.
The 4L unit arrived out of round with a nice ding in the lid ring above the gasket. I was able to force the container back into round, but worried about the seal now. The seem pretty nice for the price. I realize that $42 may be a lot to some, but for my intended use of curing from almost day one, it will be perfect.
As for the conversations about hygrometers inside the vaults, I'll use them in the vaults just like I use them in my jars. I keep an eye on various jars of the same strain, it helps me keep track of the packs state.
I thought about using it for water curing too w/out the lid tight, but thinking the 5 gal buckets will be just as easy, maybe easier to keep it all under (I use a piece of wood cut to fit the buckets bottom).
Hoping they hold up for a fair amount of time. The talks of welds breaking off is troublesome. I think they're cost effective, but only if they last!
Healthy green all,
MT