Anyone use a 9.7 ounce Aluminum Spray Bottle as a Cup?

"Much better and stronger than any aluminum can."

Not really. I have used a number of aluminum cans with this form factor. They are super narrow and this is no good for trying to get an efficient boil out of Esbit, alcohol, or butane burners.

In some cases I have cut off the bottom two inches to use as an open alcohol burner, but there are similar aluminum cans that are easier to use. They used to be readily available at the Daiso stores, but I have not seen them for the last year or two.

–B.G.–

I've seen and bought similar aluminum containers because they seem very sturdy and well made. Some of them contain sunscreen.

Bob's right – as is, they don't heat well over any kind of stove. We all know (and some of us have measured) that wide pots capture more of the heat than a narrow pot and this is a VERY narrow pot.

I played with one a little, J-B-Welding HX fins on the sides and putting it inside of a narrow chimney with a burner under it. It did much better that way, but still, it was bothersome to fill, empty, clean, you can't cook in it, and it doesn't hold much. Nor is it very weight-efficient per water held.

Ignoring the fact that you'd have to cut, polish, and you probably still wouldn't be able to ever really remove the taste or smell from the can, based on volume to surface area calculations, this isn't the most efficient cup design for holding liquids or heating them.

I would think that the alum. beer bottles would be a better choice. Emptying them is a lot more fun, and you don't need to worry about residual chemicals in the bottle.