Small Heating Element

[AceOfSpades3]

I want to build something like this (http://www.radioshack.com/product/index.jsp?productId=2911246), but much smaller and only heating a coil up to 185 C. It would need to last at least an hour, but be as compact as possible. Any suggestions?

[Sakha]

I would say your best way is using nichrome as the heating element, keeping it for over an hour and still being compact might be a little harder, probably you will end up using Li-ion batteries, but you would need to insulate them from the heat because those can be dangerous when heated.