These are the best plastic mixing bowls I have ever had. I love the grippy, heavy bottom, the durable walls, and the handle on the rim. The handle makes the bowl easy to grip when I have a stiff dough to mix, and the grippy bottom keeps in from sliding all over the counter. These are thick, which leads me to believe they are durable and will withstand a beating from a hand mixer. The colors are lovely, and versatile. Great set of bowls.