Tin

To add, the most brittle PLA I have ever used (the most brittle of all time in my case) is Proto Pasta's SS PLA as it would break even mid print. Look for my review a few posts down.
PLA is very bitchy, even with a good brand. Proto Pasta was the most notorious for breaking, but since they rely on PLA-based filament exclusively, that comparison goes out the window with other brands, especially since they focus on exotics.

if they were labeled as ZipLoc when you placed your order then they are illegally switching products.

Well not exactly the Ziploc product Brand name is owned by SC Johnson  IIRC also know as Johnson wax. SC Johnson has some sort of agreement with Iris USA  to make these boxes with the Ziplock label, Weathertight is a trade mark of Iris USA.
So these boxes are sold under the iris label the ziplock label and the Remington label.
the Boxes I received have the Ziploc label  but Ziplock customer service passed me off to Iris CS. Iris CS is not answering there phone. As they close the offices @ 4pm CST

IRIS USA, Inc.
11111 80th Ave. Pleasant Prairie, WI 53158

We actually bought ours locally, but the store has since stopped carrying the largest ones.

And I find the boxes are not manufactured or sold by Zip LOc they are made By Iris USA.
So need to get a e mail off to them.
Tin

If I simply remember to unload the hotend when I am done for the day, and put the spool away in one of the containers, I dont have any issues with moisture. Nylon is an absolute MUST to get put away when done with it. PLA & ABS, eh, I might leave them out for a couple of days at a time if I will be using them. If it isnt going to get used for a while, it gets put away

should not be difficult to build  .
something like this

tin

tin