Reddit reviews Crock-Pot Lunch Crock Food Warmer, Blue

I've considered getting this

That would depend on the wattage, and it doesn't look like it has enough to actually cook meat, though I did read about someone "cooking" cut up apples with some spices acceptably soft. Meat is much denser though.
This unit is only for rewarming, or warming up, already cooked foods, or foods that dont need full cooking for texture or safety. And it will take a couple of hours to do that once plugged in.

I'd check out the customer Reviews and customer Questions for this unit at amazon or maybe even at walmart.com to get much more info and more ideas.
http://www.amazon.com/gp/product/B006H5V8RG/ref=ask_ql_qh_dp_hza

The brand called Crock Pot used to make, and maybe still does, a small 1.5 quart model called Crockette that will cook meat and act like a regular but small slow cooker though. I cook a flank steak in my old one in the usual time. It will barely fit but works great. (If you had only 4 hrs, you would be able to cook chicken or fish but probably not the red meats unless they were very thin. The connective tissue in many meats also just requires a certain length of time at a low but hot enough temp, to break that down and tenderize those cuts.

This Lunch Crock is about 20 oz and presumably lighter weight, but the Crockette's crock and lid can also be removed to take home, and returned to the plugin unit if you want to make it more "portable."

And if you do get a small slow cooker that's small enough for you (Crock Pot or any other brand), you might want to check out some of the recipes and info about them from my previous answer here:
https://answers.yahoo.com/question/index;_ylt=AvEpfc8T4FyPLBCzkmBhT7Xsy6IX;_ylv=3?qid=20120323115314AAr62lQ

Looks like Proctor Silex makes a 1.5 qt one though, but taller and less wide than the Crockette:
http://www.amazon.com/Proctor-Silex-33015Y-2-Quart-Cooker/dp/B0002CA3C6/ref=sr_1_3?s=kitchen&ie=UTF8&qid=1451079747&sr=1-3&keywords=crockette

P.S. If you want an electric unit that can cook practically anything, or just warm up, in a very short time, you might be interested in an electric pressure cooker many of which are multi-function these days. My newest and favorite toy these days is the Instant Pot DUO60 7-in-1 I got a few months ago. It may be larger than what you want although it does come in a smaller 5 qt version, but could be made to work by just bringing the meat/etc with you and keeping in a frig till time to cook, then afterwards washing the inner pot and leaving everything at work.

You (and OP) might benefit from a device that slowly warms up your food and keeps it warm all day. I like this Mini Crockpot Lunch Warmer for soups and stews ~$18-$24 (depending on color choice) and the Hot Logic Mini Portable Oven ~$40 ($30 during lightning sale or Prime day) for (frozen) raw or cooked chicken or fish, cooked beef, turkey meatballs, meatloaf, pasta and sauce, cooked rice, anything you want heated up without drying it out. Not great for crispy things like pizza, fried chicken or certain vegetables like broccoli that can't be slow cooked for hours without becoming pale and bitter. If you want to cook your food at lunch, the Dash Mini Griddle ~$10 can make grilled cheese sandwiches, quesadillas, toasted wraps, eggs, pancakes, and also has a grill version and waffle maker, all very small (cook one burger at a time).

Breakfast: Coffee with 3tbsp of Sugar Free creamer (1sp) with 2/3 of a fiber one bar (3sp/4 for the whole thing, but I wasn't that hungry)

Lunch: Brought my work crockpot filled with buffalo chicken breast (5 oz chicken breast, ranch powder, franks red hot) (0sp) To make a wrap with an Ole! tortilla (1sp) and some avocado (3sp) and a side salad (0sp)

Snack: Greek yogurt with 2 tbsp of chocolate sugar free Jello pudding (0sp) and strawberries

Dinner is more chicken in the home crock pot (bourbon chicken for 3 sp, with rice for 6sp and whatever veggie I dig out of the fridge)

Just a tip, but on amazon, you can buy a crockpot for reheating lunches that is inconspicous ( https://www.amazon.com/Crock-Pot-SCCPLC200-BL-20-Ounce-Lunch-Warmer/dp/B006H5V8RG ). No need to skimp on the hut lunches.

My mom is like you, in that she won't eat cold chicken or other cooled meat in a salad. It triggers her eosinophilic esophagitis gagging/vomiting.
She usually makes a big crock pot recipe with proteins and grains, eats it for dinner, then uses the leftovers for her lunch the next day. She has a small portable electric thermos that she uses. It's exactly like this one: https://www.amazon.com/Crock-Pot-SCCPLC200-BL-20-Ounce-Lunch-Warmer/dp/B006H5V8RG

There's also this: Crock-Pot lunch warmer

Can I add a 20-oz Slow Cooker to the list? It's a food warmer (it won't cook) but I love having it at my desk at work. It heats leftovers to a lovely temp, and if I freeze leftovers they are hot and yummy at lunch. Cans of Progresso soup work wonderfully. It's on Amazon here.

This with a 50watt or larger power inverter. These were Christmas gifts for our family last year. I dont think we paid this much but these are awesome.

Crock-Pot Lunch Crock Food Warmer, Blue https://smile.amazon.com/dp/B006H5V8RG/ref=cm_sw_r_cp_apa_i_XIFZDbRGKNRPM

What about saving half of your dinner for the next day's lunch and then supplementing your lunch with snacks? Protein bars and shakes are great snacks.

To solve the no kitchen problem--You can heat up your lunch at home and carry hot items in a Thermos and cold items you can carry in an insulated bag with ice packs. They also make CrockPot Food Warmers, so you could bring all of your food in with cold packs and then heat it up in your office (or you could heat up things like canned soup!). As others have suggested, you can make things like sandwiches, salads, fruit, cold noodle salads, etc. that don't need to be heated.

Can you bring something like this?


https://www.amazon.com/Crock-Pot-SCCPLC200-BL-20-Ounce-Lunch-Warmer/dp/B006H5V8RG

Never used it but I've seen it recommended here before.