While Hamilton Beach and Crock Pot make slow cookers, we also queried companies that make stovetop cookware, since those lids also often feature a hole. The answer? All of the above, as it turns out.

While many slow cookers today are very similar to the original design of that era, there have been some upgrades, too. There ...

The Lunch Warmer has a stainless steel bowl with a lid, which is where you put your food. When you're ready to start warming it up, simply put the bowl in the Crock-Pot, screw on the lid ...