How to make a glass Klein Bottle...

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To make a Klein Bottle, we work with a scientific glass lathe.This lets us turn glass tubing while heating it.

First, we start with a section of glass tubing. We seal one end, and then, using a glass lathe, we rotate this over a torch and inflate it by blowing into it when it's red-hot.


Next, make the inner horn. We flare the end of 1/2 inch tubing, bend and cut.

Now make the outer loop from a length of 1/2 inch tubing:

The outer looop and inner horn fit together to form a classic S-shape:

Next, torch open a hole on the bottom of the pear-shaped bottle, and weld in the inner horn:

Now, weld the inner horn to the sidewall of the reservoir. Notice that the belly-button is sealed shut right now.

We then pierce the bellybutton with a torch so that we can attach the outer loop. Then we weld on the outer loop. Finally anneal it, and we're finished!

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