Trangia stoves have a snuffer/simmer adjustment and a separate lid (with a gasket) that screws on, so you can just leave the unused alcohol in the stove. It's not light compared to other alcohol stoves, but it's not overly heavy, either.

The best attachment I've found for the Trangia burner is the Clikstand windscreen/pot support (www.clikstand.com); the Evernew .9L titanium pot works really well with it, and stove, Clikstand and a small spoon store inside the pot quite nicely. The whole setup, including a Platysport bottle for extra fuel, weighs no more than a Jetboil. (I can't recall the exact weight, since I no longer use alcohol stoves and don't have one lying around. It worked fine, I just found I liked the simplicity of canisters better - strictly a subjective choice on my part.)