Marking and cutting.
We are going to make a glass cube, so we need to divide our glass into 6 equally sized squares. Cutting glass is a tricky process. If you have never worked with glass before, I would recommend watching some instructional videos on youtube. You can tell a good cut by the sizzling sound that glass cutting tool makes. After the cut your glass piece will have very sharp edges. You can dull them with a piece of sandpaper. Clean the glass with Windex to remove fingerprints and glass particles before foiling.
Use the adhesive copper tape to foil the edges of the glass squares.
Soldering the edges.
Next, apply the flux on to the copper taped edges and apply the solder.
Assembling the cube.
You can use a cardboard box or a wooden block with a straight 90 degree angle to tack the edges of the cube together. Make sure you leave one side of the cube open to put something inside before closing it up. You can put anything you want in your glass cube to make it unique and interesting. I decided to put a piece of origami inside. If you want to keep your cube empty, you can of course always do that too. The last step is soldering a piece of metal wire on top to make a loop where you'll tie your string to.