check your local dollar store the Purple one has 2 gal 10 for .99 and 2 Xl for .99 not as big as the ones below but still large, or Big Lots if you have them in your area 4 ct xl 11 Gallon for 4.00 made by Hefty these were also blue
Really like these big ones, Have seen on TV where people are posessive of the tupper ware, I'm like that w/these bags :)