It doesn't help us if you don't tell us the brand.

From my earlier post in this thread...

We get LnL type containers at Target...

Here's a link to the brand we get at Target. 14 boxes for 22.99 works out to about $1.64 a box.

This set of 6 Lock and Lock containers will be available through Amazon on Jan 7 for $15.36. That works out to $2.56 a box.

Those are just examples with a quick search. You can probably find better deals or something more to your liking with a little research. Obviously you want to stay away from Rubbermaid and Glad snap on lid types. The key (for me) to selecting a brand is the seal. I always avoid rubber gaskets. Rubber does not hold up to the elements well and will always fail eventually. At the time I bought them, the Target brand had silicone gaskets. The Lock and Locks above not only have silicone gaskets but a double hollow gasket. Better seal with more flex for extreme conditions.

As for whether LnLs have been discontinued, I went straight to the horse's mouth. I wrote LOCK&LOCK Co., Ltd. and asked. When they get back to me I'll post their response here.

Sold

...the brand we get at Target.

Sistema brand, made in New Zealand. Those certainly look nice. The only thing they say about the gasket is that it's "flexible", so I dunno how to tell if it's silicone or not. The latches are hinged rather than flexible which I consider a big plus over the LnL design which have been known to snap off. The latches are only on the long sides rather than all four sides, though.

I'm pretty sure all these gaskets are hollow. They were hollow on the cheap junk Dollar Tree containers. I did buy *one* latch-top container a few years back on which the gasket was not hollow, and it was a bear trying to get the lid on and latched down. And it didn't seal reliably.

Perfection!

While we're talking about options and quality, if like to ask about the type offered at fred Meyer https://www.fredmeyer.com/p/snapware-airtight-food-storage-clear-blue/0088440802472
Which is my most readily available store in my part of Alaska. And obviously living here I will need my boxes to hold up (i have not yet even planted) Snapware- anyone tried it?

I have found quite a few of these boxed in GA where the climate is mild but often wet. Many where missing one of the snap closers, others appeared undamaged but had a good bit of moisture inside them...this could be used error and not a structural problem with the box. My gusse is they would not hold up well in colder climates, unless you found a very consistantly dry spot to hide or planned to check the box often.

I have no idea how they hold up, but I'm preparing one now to plant tomorrow. I'll let you know in a couple years. ;)
IMO not knowing is part of the fun. There are many factors that can make a box go missing. It's a quest to find a box and there are no guarantees you will. It's the quest that keeps me going. :)

While we're talking about options and quality, if like to ask about the type offered at fred Meyer https://www.fredmeyer.com/p/snapware-airtight-food-storage-clear-blue/0088440802472
Which is my most readily available store in my part of Alaska.

According to information online, they use rubber O rings. I’m not sure that would be my first choice for Alaska. But letterboxing is adventure, right!? 😄

Rubber is not the best for this; it dries out and cracks. Alaska might be its best application, though, since I suspect heat makes it dry out and crack faster.

There's also the possibility that it's not really rubber, just described as rubber meaning it's a soft rubbery material. Some people just don't see a need for precise language.