This is what I finally settled on. Steel, spill-proof lid, and the lid can be completely disassembled to be cleaned. This last is very important- I had a spill-proof mug that couldn’t be taken apart, and it built up some serious funk. I found out when the lid broke from being dropped; it was gross.
I just got one with a handle from Target for $17 on sale. It is pretty much exactly what I was looking for. Sadly, I think it is the foam insulated one instead of the vacuum one, but it still a good mug for the price. I’ll be putting it to good use tomorrow morning.