The Stanley thermoses are very tough, just don't put anything vacuum insulated in the dishwasher, even if it says it's dishwasher safe. It will still greatly reduce the lifespan.

I used Thermoses a lot when I was younger and didn't have as much access to microwaves to heat up my lunch. To get a strong odor out of them, after washing them, fill with warm water and add a teaspoon or two of unscented household bleach. Then put the lid on and shake it to get the bleach into all the grooves, etc. That will disinfect, deodorize, removes coffee and tomato soup stains, etc. I let it sit about 30 minutes then flush it with lot of water until all the bleach smell is gone.