Walmart's model paints are not very good. If you would like to go with cheaper brands, then the way to go is to visit your local craft store, not Walmart.
Amen to that - I have some paints from 15 years ago which are still going strong (go amethyst!). I like the older GW flip-top lids, though I think the new Foundation paint pots are also quite good.
I'm not sure that he designed them, I just know that he insisted on using them.Good old Mike - met him many moons ago at my first ever Games Day - thoroughly nice chap who was happy to povide pointers. Didn't know he had designed the flip top lid, cool fact!