The Torah (Bamidbar 31:23) commands us that utensils made of six metals which were acquired from a Gentile must be toiveled (immersed in a mikvah) before they may be used with food. The six metals are gold, silver, copper, iron, tin, and lead. Glass utensils must be toiveled as well, based on a rabbinic requirement. If one purchased used utensils, they must first be kashered before the tevilah. However, if one borrows or rents utensils from a Gentile, there is no mitzvah of tevilas keilim. Before immersing, the utensils must be completely clean. All labels and even residual glue from the labels must be removed prior to tevilah. Prior to tevilah, a beracha is recited.
Most regular items can be immersed without ruining them. For certain electronic items the water should be shaken out, and one can use a blow dryer to dry the inside or it should be left to dry for three days. If it has a digital panel, and one is scared that it will get ruined, he should gift it to a non-Jew who will lift it up and take possession and then borrow it back from him.
| Item | Tevilah | Bracha |
| Aluminum (disposable) | No | No |
| Aluminum (heavy grade disposable – multiple use intention) | Yes | Yes |
| Aluminum (non-disposable) | Yes | Yes |
| Baby Bottle (glass) | Yes | Yes |
| Baby Bottle (plastic) | No | No |
| Baking sheet | Yes | Yes |
| Blech | No | No |
| Blender (glass) | Yes | Yes |
| Blender (plastic) | Metal blades only | Yes |
| Cast iron | Yes | Yes |
| Ceramic (e.g. coffee mug) | Minhag to toivel | No |
| Chicken Scissors | Yes | No |
| China | Minhag to toivel | No |
| Coffee Maker (glass pot) | Yes | Yes |
| Coffee Maker Machine | Needs Evaluation | Needs Evaluation |
| Colander (Metal) | Yes | Yes |
| Colander (Plastic) | No | No |
| Corelle (Plates & Bowls [which are glass]) | Yes | Yes |
| Corelle (Mugs [which are glazed ceramic]) | Minhag to toivel | No |
| Cork | No | No |
| Corning ware | Minhag to toivel | No |
| Crystal | Yes | Yes |
| Can Opener | No | No |
| Cookie Cutters | Yes | No |
| Cooling Racks | Yes | Yes |
| Crock Pot (Ceramic Insert) | Minhag to toivel | No |
| Crock Pot (Metal Insert) | Yes | Yes |
| Crock Pot Glass Lid | Yes | Yes |
| Cutting Board (glass) | Yes | Yes |
| Cutting Board (metal) | Yes | Yes |
| Cutting Board (plastic) | No | No |
| Cutting Board (wood) | No | No |
| Dish Rack | No | No |
| Farberware | Yes | Yes |
| Food Processor | Metal inserts only | Yes |
| Frying pan (with Teflon coating) | Yes | No |
| Frying pan (without Teflon coating) | Yes | Yes |
| George Forman Grill | Yes | No |
| Glass | Yes | Yes |
| Hot plate metal (direct contact with food) | Yes | Difference of Opinion |
| Hot plate (used under pots/pans)) | No | No |
| Hot Water Urn | Yes | Yes |
| Keurig Machine | No, recommended to sell to a non-Jew | No |
| Meat Tenderizer Hammer | Yes | No |
| Meat thermometer | No | No |
| Metal | Yes | Yes |
| Microwave Oven | Glass Plate Only | Yes |
| Mixer beaters (if used exclusively with not yet edible food [e.g. dough, batter]) |
Yes | No |
| Mixer beaters (if to be used at times with already edible food [e.g. ice cream]) |
Yes | Yes |
| Oven Racks | No | No |
| Peeler (if used mainly for foods that are edible) | Yes | Yes |
| Peeler (if used mainly for foods that are not yet edible) | Yes | Yes |
| Peeler (if used exclusively for foods that are not yet edible) | Yes | No |
| Pizza Maker | Yes | Difference of Opinion |
| Plastic | No | No |
| Popcorn Maker | Yes | Difference of Opinion |
| Porcelain Enamel (since it is a coating for metal) | Yes | No |
| Pot (with Teflon coating) | Yes | No |
| Pot (without Teflon coating) | Yes | Yes |
| Pyrex | Yes | Yes |
| Rubber | No | No |
| Sandwich Maker | Yes | Difference of Opinion |
| Stainless steel | Yes | Yes |
| Styrofoam | No | No |
| Stoneware (glazed) | Minhag to toivel | No |
| Stoneware (non-glazed) | No | No |
| Teflon-coated cookware | Yes | No |
| Toaster Oven | Racks and Trays only | Yes |
| Urns and kettles | Yes | Yes |
| Waffle Iron | Yes | Difference of Opinion |
| Wood | No | No |