Reddit mentions of Sistema To Go Collection Soup Mug, Large, Varied, 1 count

I have a microwave at my office space rental, but I'm on the road a lot with my job, so I've looked into many different solutions. There are a variety of options available.

Non-electronic storage:

They make a squattier version of the Thermos you have from RTIC, which is what I sometimes use:

https://www.amazon.com/gp/product/B07DRP86T1

Spoon for size comparison:

https://i.imgur.com/AR4itKB.jpg

It's not so deep that I can't get a spoon in. It'd be nice if it were a little wider, but it does the job. A bit smaller than your Thermos at 17 ounces. Pinnacle Thermoware sells insulated a pretty nice insulated bowl set, if you specifically want a bowl shape:

https://www.amazon.com/Pinnacle-Serving-Salad-Soup-Dish/dp/B07RT1X47C/

If you need more food than just one bowl can hold, Ailijin makes a 2-bowl, single-tote insulated solution: (kind of a round bento-style)

https://www.amazon.com/AILIJIN-Leakproof-Insulated-Stainless-Portable/dp/B07QQ9JYG3/

If you need to heat up a soup before you go to put into an insulated storage container, I use one of these vented microwave mugs, so it doesn't explode all over the inside of my microwave when heating up:

https://www.amazon.com/gp/product/B01F5IC478/

Electronic storage:

Beyond that, there are 3 common electronic options, depending on what power you have available: (12V in a car or an A/C wall plug)

1. Crockpot Lunch Crock (A/C power)
   
2. RoadPro 300F lunchbox oven (12V car power)
   
3. HotLogic lunchbox oven (A/C power, car-compatible A/C, or 75w+ inverter for car power)
   
   The Crockpot unit is basically like your Thermos, except you plug it in to heat it, and it has a pretty nice wide bowl size. My buddy has one & it's pretty dang handy! My brother has the RoadPro, as he's on the road all day long, and it's super nice because it does a pretty decent job (heats up to 300F, basically like a mini oven), so you can heat up burritos, melt cheesy stuff like lasagna, etc.
   
   The HotLogic is nice because instead of just being a mini portable crockpot, it's also a mini oven, and can be used from a wall plug, a newer-vehicle 2-prong car plug, or with a 75-watt (minimum) inverter. There's a good Facebook group available as well! It heats up to 218F & then holds the food at 180F, so it's more for reheating food than cooking food, like the RoadPro can do (HotLogic says you can cook chicken breast in it in about 2 hours, but ehhh...), but it's also a bit more versatile as you can plug it directly into the wall an hour before lunch & have your food ready to go without needing a microwave or toaster oven.
   
   Homemade soup:
   
   If you're into soup & haven't heard of Souper Cubes, it's basically a silicone ice cube tray with 1/2-cup & 1-cup markings (4 per tray) & lids, plus a wire frame around the top to hold it together, which makes portioning out bulk soup cooks super easy:
   
   https://www.soupercubes.com/
   
   I mean, just look at this insanity:
   
   https://www.instagram.com/p/B0cU_UFBSQp/
   
   Also, if you're into making soups at home, the Instant Pot (electric pressure cooker) is my BFF...it makes cooking soup a lot faster & more automated (aka easier overall!). Poaching from another one of my posts, here are some soup ideas: (I use the IP for soups, stews, bisques, broths, stocks, etc.)
   
   

• Ham & bean
  
• Vegetable beef
  
• Chili con carne (chili is just thick soup...lol)
  
• Olive Garden's creamy chicken gnocchi
  
• Broccoli cheddar potato soup
  
• Asian chicken noodle
  
  Some ideas for soup toppings & easy no-knead breads:
  
  
• Ranch oyster crackers
  
• Cheese & onion roasted chickpeas
  
• Homemade flavored croutons
  
• Crusty rolls
  
• Ciabatta bread
  
  Also if you're trying to get more veggies in your diet, check out this master guide on making blended soups in the Instant Pot, definitely worth a read:
  
  https://allthenourishingthings.com/make-blended-soup-instant-pot/
  
  I tend to make soup about once a week in my Instant Pot at home, then freeze it in my Souper Cube containers, and keep a stash of different varieties in my freezer so I can just grab one & go. When you have a solid storage system setup (electronic or non-electronic), it makes the whole process pretty dang easy:
  
  

1. Store a variety of soup flavors at home (Souper Cubes or canned soup)
   
2. Heat it up in the vented mug if you need it hot before you leave
   
3. Put it into your container of choice
   
4. Heat up your container (if needed) & enjoy!
   
   For me, it's really about nailing down a solid process & taking care of all of the little annoying details. Like you said, the tall insulated mugs are too small to get a spoon into & eat out of, so you have to find something better that meets the needs of your individual situation better. Then, setting up a system to support convenience means you can always have a variety of soups to grab before you leave the house, whether it's a can that you heat up in a vented mug & store in a food thermos or a frozen Souper Cube that you toss in a Crockpot Lunch Crock & plug in before lunch!

I've used this for years:

Sistema 21141 To Go Collection Soup Mug, Large, Varied, 1 count https://www.amazon.com/dp/B01F5IC478/ref=cm_sw_r_cp_apa_i_0uj0Db05ZCSXP