The KMart/Wallyworld grease pot has been the staple of budget backpackers for quite a while. I used a KMart one for two years--took off the knob on the lid and replaced it with a piece of thin wire. It's still good although it has a few dents. While it has to be replaced every few years, you can buy quite a few grease pots for the price of one Ti pot!
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey