These have work perfectly in my Keurig, no leaks no problems with these at all. I would stop using my Keurig if I could not get these cups as it is very important to me to be able to use the brand of fresh ground coffee of my choice as most premade K-cups bother my  stomach. These also keep my coffee fresh once in the ifill cup. You can also put more coffee in the ifill cup then premade K-cups. The ifill cup makes a richer, fuller, flat out better cup of coffee. The convenience of these cups has made my life better, Thank You ifill