If you own a Simple Human trash can, you really need to purchase their bags. It is what it is, but they work hands-down better than any other liner out there.  I will say, they're made of excellent materials, and hold up to all kinds of stuff being stuffed into it. I have not had one leak or tear yet!  Even more handy is the sticker near the end which reminds you to buy more bags!  With all that going for it, it's worth spending the money to buy the bag that fits the can best.