We have this diaper pail https://www.toysrus.com/product/index.jsp?productId=2373657
It's great because it keeps the smell in while closed (has a place for little oder disc things) and it uses standard size regular trash bags, so you don't have to keep buying special refills. Plus it's inexpensive. It does smell a bit when you open it to put in a diaper, or to change the bag (but only when it's open), but worth it imo. It saves so much money not having to get special bags, so a few seconds of smell is ok for me.