Lowes Failed to close the lid . cheap plastic can

Simple. Lowes sells quart  paint in plastic cans but not screw-on lids. As a direct consequence  of this,

1) the metal lid is liable to come off *since it's designed like a metal can lid*, Given any lateral pressure on the can, which , because it is thin plastic, will compress, and exert  force on the lid, the lid will pop off. 

2) the can is disguised as metal insofar as the lid you see is metal -and the only part of the can which is actually visible is the lid. 

3) The mating of the lid and can is the same as an all metal can. But that joint only holds BECAUSE both parts are inflexible metal. That's why paint lids are hard to take off. With the Valspar lid, it literally pops off when you squeeze the can. 

So if the can is exposed to lateral pressure, the lid pops off, of course, just like any other lid experiencing an increase in pressure *because the flexible plastic walls are decreasing the area insde as they are crushed*. You can't crush a metal can- that's the whole point opf a metal can.

So, in short , Lowes has saved itself 20 cents per can on their paint at the cost of an increase in these types of spills, which of course are all at the customer's sole  expense. 

Isn't that clever? I think that's clever. 

That  is why I don't shop at Lowes anymore and why I don't trusst any of the other Lowes brand names- Valspar (this paint)  , Kobalt , Reliabilt, Garden Treeasures etc etc... because , really, if they're going to play games with paint cans to save a nickle where else in say, their tools, are they cost cutting at my expense ?