If you are willing to at least consider stainless, Zojirushi makes some wonderful simple and durable without looking clunky products. I have an insulated carafe from them we use daily to keep extra brewed coffee warm so we don't have to brew multiple times.

Try Gochujang? It's a little sweeter depending on the source, and more a paste then a sauce but I found myself using it in similar applications. Kinda sad the story behind Sriracha.