However, unless you are careful -- and probably 25% of the time even if you are -- this is how they actually open:
Note the gap riding the edge of the upper container, meaning that when you close it, it doesn't seal. In this particular case, I'd even been careful during the initial opening, but it failed like this on subsequent openings.
Now we go through this stuff fast enough that it doesn't particularly matter, but the thing is that the previous design worked just fine. I guess Maple Leaf needed to squeeze an extra fraction of a cent out of each sale by cheapening out on the packaging a bit.
