{"id":10387,"date":"2026-04-02T09:00:08","date_gmt":"2026-04-02T16:00:08","guid":{"rendered":"https:\/\/www.zojirushi.com\/blog\/?p=10387"},"modified":"2026-03-27T12:25:40","modified_gmt":"2026-03-27T19:25:40","slug":"lunch-jars-and-food-jars","status":"publish","type":"post","link":"https:\/\/www.zojirushi.com\/blog\/lunch-jars-and-food-jars\/","title":{"rendered":"Back to Basics: Lunch Jars and Food Jars"},"content":{"rendered":"\r\n
\"Lunch<\/a><\/figure>\r\n\r\n\r\n\r\n

Packing a hot lunch sounds straightforward enough, but anyone who has opened a bag at noon to find a cold, soggy meal knows the reality can fall short. That is where insulated lunch containers come in. At\u00a0Zojirushi, we make two distinct types of portable containers designed to keep your food hot, fresh, and ready when you are: the Vacuum Insulated Lunch Jar and the Vacuum Insulated Food Jar. They share the same core technology, but they serve\u00a0different needs. Understanding the difference helps you choose the right container and get the most out of it every single day.\u00a0<\/p>\r\n\r\n\r\n\r\n

If you are searching for the best stainless steel lunch container, a reliable leak proof food container, or simply a smarter way to pack a hot lunch for work or school, you are in the right place.\u00a0Let\u2019s\u00a0take a closer look.\u00a0<\/p>\r\n\r\n\r\n\r\n

Lunch Jar vs. Food Jar:\u00a0What\u2019s\u00a0the Difference?<\/strong>\u00a0<\/h2>\r\n\r\n\r\n\r\n

Both the lunch jar and the food jar use vacuum insulation to keep food hot or cold for hours. The difference comes down to structure and what they are built to carry.\u00a0<\/p>\r\n\r\n\r\n\r\n

The Vacuum Insulated Lunch Jar<\/strong>\u00a0<\/h3>\r\n\r\n\r\n\r\n

The lunch jar is a complete, self-contained meal system. It features a vacuum insulated outer container that holds multiple microwaveable inner bowls stacked inside. Depending on the model, you get two, three, or four separate compartments, making it easy to pack a full, varied meal: rice in one bowl, soup in another, a side dish in a third. Foods stay separated, flavors stay distinct, and everything stays warm together inside the insulated outer container.\u00a0Zojirushi\u00a0calls it \u201cGenius Bento\u201d\u2014and once you use\u00a0one, it is easy to see why.\u00a0<\/p>\r\n\r\n\r\n\r\n

The Vacuum Insulated Food Jar<\/strong>\u00a0<\/h3>\r\n\r\n\r\n\r\n

The food jar is a single-compartment container designed for one dish at a time: soup, stew, oatmeal, curry, noodles, rice. It is compact, lightweight, and built around a wide opening that makes filling, eating, and cleaning simple. The double wall stainless steel construction keeps food hot for hours, and the\u00a0SlickSteel\u00ae polished interior resists staining and odors. The food jar also has a unique trick: it can be used for \u201ccook in jar\u201d thermal cooking, where the heat\u00a0retained\u00a0inside the jar continues cooking grains or softening vegetables after you seal the lid. No microwave, no extra appliances, no reheating needed.\u00a0<\/p>\r\n\r\n\r\n\r\n

How Vacuum Insulation Works<\/strong>\u00a0<\/h2>\r\n\r\n\r\n\r\n
\"Image<\/a><\/figure>\r\n\r\n\r\n\r\n

A vacuum between the inner and outer layers blocks heat transfer through air. Because air is removed from that space entirely, heat has no easy pathway to escape or enter. Your food stays at the temperature you packed it, whether that means piping hot soup at lunchtime or a chilled salad on a warm day.\u00a0<\/p>\r\n\r\n\r\n\r\n

This is what sets a true vacuum insulated food jar apart from a standard\u00a0insulated\u00a0container\u00a0or plastic container. The double wall stainless steel construction adds durability and keeps the container from sweating on the outside, even when the contents are hot. Every\u00a0Zojirushi\u00a0food jar and lunch jar features\u00a0SlickSteel\u00ae interior technology\u2014an electropolished surface that resists staining, does not absorb odors or flavors, and stays clean with minimal effort.\u00a0<\/p>\r\n\r\n\r\n\r\n

One tip that makes a real difference: always preheat your container before filling it. Add boiling water, let it sit for a few minutes, pour it out, then add your food. This warms the interior walls and extends heat retention noticeably. The same principle applies in reverse for cold foods\u2014pre-chill the container first with ice water before packing.\u00a0<\/p>\r\n\r\n\r\n\r\n

For best results, fill the main bowl and soup bowl as full as possible. A larger volume\u00a0retains\u00a0heat better than a partially filled container, so topping things off gives you better performance over the course of the day.\u00a0<\/p>\r\n\r\n\r\n\r\n

The\u00a0Zojirushi\u00a0Vacuum Insulated Lunch Jar Lineup<\/strong>\u00a0<\/h2>\r\n\r\n\r\n\r\n

Every\u00a0Zojirushi\u00a0lunch jar features a vacuum insulated outer container, nonstick coated exterior, microwaveable inner bowls, a soup bowl with a gasketed lid to prevent spills, and a snap-on lid that keeps all bowls\u00a0contained. All models are BPA-free.\u00a0<\/p>\r\n\r\n\r\n\r\n

Mr. Bento\u00ae Stainless Lunch Jar \u2014 SL-JBE14<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"Mr.<\/a><\/figure>\r\n\r\n\r\n\r\n

4 inner bowls | 37\u201341 oz. total capacity | Forked spoon | Carrying bag<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

The most complete\u00a0option\u00a0in the lunch jar lineup. Four inner bowls give you room for a full meal\u2014rice, a main dish, vegetables, and soup\u2014all warm and organized. The included forked spoon and carrying bag make it a self-contained system ready for the office, campus, or anywhere your day takes you.\u00a0<\/p>\r\n\r\n\r\n\r\n

Ms. Bento\u00ae Stainless Lunch Jar \u2014 SL-MEE07<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"SL0MEE07\"<\/a><\/figure>\r\n\r\n\r\n\r\n

2 inner bowls | 21 oz. total capacity | Chopsticks | Tote bag<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

The most compact Ms. Bento\u00ae model, built for lighter appetites or anyone who prefers a streamlined daily lunch. Two inner bowls keep your main and side separate, while the included chopsticks and tote bag keep everything together and easy to carry.\u00a0<\/p>\r\n\r\n\r\n\r\n

Ms. Bento\u00ae Stainless Lunch Jar \u2014 SL-NCE09<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"SL-NCE09\u00a0\"<\/a><\/figure>\r\n\r\n\r\n\r\n

3 inner bowls | 28\u201350 oz. total capacity | Forked spoon | Tote bag<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

Three inner bowls offer more versatility in a slim, well-proportioned design. The forked spoon and tote bag are included, making this a practical everyday choice for commuters who want variety without bulk.\u00a0<\/p>\r\n\r\n\r\n\r\n

Classic Bento\u00ae Stainless Lunch Jar \u2014 SL-GRE18<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"<\/a><\/figure>\r\n\r\n\r\n\r\n

3 inner bowls | Forked spoon + chopsticks | Carrying strap<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

The most accessory-rich model in the lineup, with both a forked spoon and chopsticks included alongside a carrying strap. Three inner bowls make it easy to pack a balanced, well-rounded lunch, and the classic design suits any setting.\u00a0<\/p>\r\n\r\n\r\n\r\n

Classic Stainless Lunch Jar \u2014 SL-XE20<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"SL-XE20\u00a0\"<\/a><\/figure>\r\n\r\n\r\n\r\n

3 inner bowls | Chopsticks | Carrying strap<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

A clean, no-fuss stainless steel lunch container for everyday use. Three inner bowls, chopsticks, and a carrying strap make the SL-XE20 a dependable\u00a0option\u00a0for anyone who wants reliable heat retention in a straightforward, classic design.\u00a0<\/p>\r\n\r\n\r\n\r\n

The\u00a0Zojirushi\u00a0Vacuum Insulated Food Jar Lineup<\/strong>\u00a0<\/h2>\r\n\r\n\r\n\r\n

Every\u00a0Zojirushi\u00a0food jar features\u00a0SlickSteel\u00ae interior technology, a wide opening for easy filling and eating, a lid with gasket to prevent spills, and a removable lid cover for easy cleaning. All models are BPA-free. The food jar lineup spans nine ounces to twenty-five ounces, so there is a size for every appetite and every kind of dish.\u00a0<\/p>\r\n\r\n\r\n\r\n

Stainless Steel Food Jar \u2014 SW-LA30\/40<\/a> \u2022 NEW<\/strong>\u00a0<\/p>\r\n\r\n\r\n\r\n

\"Grey<\/a><\/figure>\r\n\r\n\r\n\r\n

2\u20117\/8\u201d wide opening |\u00a0SlickSteel\u00ae interior<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

The newest addition to the food jar family features the widest opening in the lineup at 2\u20117\/8 inches, making it exceptionally easy to fill and eat directly from the jar. The\u00a0SlickSteel\u00ae interior keeps the surface clean, non-reactive, and odor-resistant for daily use.\u00a0<\/p>\r\n\r\n\r\n\r\n

Stainless Steel Food Jar \u2014 SW-KA30\/40\/52<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"salad<\/a>\r\n
Breakfast with croissant, orange juice and coffee on dinner white table<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

10, 14, or\u00a018 oz. | 2\u20117\/8\u201d wide opening | Therma Chamber Lid |\u00a0SlickSteel\u00ae interior<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

Available in three sizes, the SW-KA series introduces the Therma Chamber Lid\u2014an insulated lid that adds an\u00a0additional\u00a0layer of heat retention at the top of the jar, where heat is most likely to escape. A strong choice for anyone who prioritizes keeping soups and broths hot\u00a0through\u00a0a long workday.\u00a0<\/p>\r\n\r\n\r\n\r\n

Stainless Steel Food Jar \u2014 SW-KA52H\/75H<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"grey<\/a><\/figure>\r\n\r\n\r\n\r\n

18 or\u00a025 oz. | 2\u20117\/8\u201d wide opening | Therma Chamber Lid |\u00a0SlickSteel\u00ae interior<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

The same Therma Chamber Lid technology as the SW-KA series, now in larger capacities. The\u00a025 oz. size holds about two full bowls of soup and is ideal for stews, noodle dishes, grain bowls, or anyone who wants a genuinely satisfying meal-sized\u00a0portion\u00a0on the go.\u00a0<\/p>\r\n\r\n\r\n\r\n

Zojirushi\u00a0x Hello Kitty\u00ae Stainless Steel Food Jar \u2014 SW-EAE50KT<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"White<\/a><\/figure>\r\n\r\n\r\n\r\n

17 oz. | 2\u20111\/2\u201d wide opening |\u00a0SlickSteel\u00ae interior<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

A beloved collaboration. The\u00a0Hello Kitty\u00ae\u00a0edition brings the same reliable vacuum insulation and\u00a0SlickSteel\u00ae interior as the rest of the food jar lineup, wrapped in a cheerful collectible design. Perfect for school lunches, a thoughtful gift, or anyone who loves a little personality in their everyday carry.\u00a0<\/p>\r\n\r\n\r\n\r\n

Stainless Steel Food Jar \u2014 SW-EK26H<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"purple<\/a><\/figure>\r\n\r\n\r\n\r\n

9 oz. | 2\u20111\/2\u201d wide opening |\u00a0SlickSteel\u00ae interior<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

The most compact food jar in the lineup. At nine ounces, the SW-EK26H is the right choice for a cup of soup, a small snack, a dip, or a side dish. Lightweight and easy to slip into any bag, it pairs naturally with a sandwich or bento for a well-rounded lunch.\u00a0<\/p>\r\n\r\n\r\n\r\n

Stainless Steel Food Jar \u2014 SW-EAE35\/50<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n

\"Soup<\/a><\/figure>\r\n\r\n\r\n\r\n

12 or\u00a017 oz. | 2\u20111\/2\u201d wide opening |\u00a0SlickSteel\u00ae interior<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

A versatile mid-size\u00a0option\u00a0and one of the most popular food jar models. Available\u00a0in\u00a012 or\u00a017 oz., the SW-EAE35\/50 is an excellent everyday choice for soups, oatmeal, pasta, or\u00a0any one-dish hot lunch. A reliable starting point for anyone new to food jars.\u00a0<\/p>\r\n\r\n\r\n\r\n

Stainless Steel Food Jar \u2014 SW-FCE75<\/strong>\u00a0<\/a><\/p>\r\n\r\n\r\n\r\n\r\n\r\n

25 oz. | 2\u20113\/4\u201d wide opening |\u00a0SlickSteel\u00ae interior<\/em>\u00a0<\/p>\r\n\r\n\r\n\r\n

The largest single-compartment food jar in the lineup. The SW-FCE75 holds about two bowls of soup and is ideal for generous servings of stew, ramen, curry, or grain-based dishes. The 2\u20113\/4\u201d wide opening makes filling and cleaning easy, and it is a popular choice for anyone packing a real, satisfying hot lunch for a full workday.\u00a0<\/p>\r\n\r\n\r\n\r\n

Which One Is Right for You?<\/strong>\u00a0<\/h2>\r\n\r\n\r\n\r\n

The lunch jar and food jar both solve the same core problem: getting a hot, homemade meal from your kitchen to wherever you need to be, without a microwave and without compromising on quality. The choice between them comes down to how you like to eat.\u00a0<\/p>\r\n\r\n\r\n\r\n