The video clip shows a battery of 6 soda can Leyden jars acting as tank capacitors for a small tabletop Tesla coil.
Step 1: Materials
1. An empty hydrogen peroxide bottle, the standard 16 fluid ounce size. These are made of brown HDPE (high density polyethylene) plastic.
2. An empty 12 ounce soft drink can. Brand does not matter.
3. Aluminum duct tape. This is used to seal heating and AC ducts. Do not use the common fabric "duck" tape!
4. Round head brass screw, 8-32 size, with two brass washers and one 8-32 nut. An inch and a half long screw is fine. You can use steel hardware, but brass has better conductive properties.
5. A piece of copper wire about 3 inches long.
Optional: Brass 1/4 inch round ball, drilled and tapped for an 8-32 screw. These are usually sold in home centers and lamp shops as lamp repair pieces.
Screwdriver to fit the bolt you're using
Step 2: Assembly
With a sharp knife (X-Acto, etc.) pierce the peroxide bottle at the bottom of the top bulge. There are two bulged areas on the common H2O2 bottle, one around the bottom and one where the cone shaped top meets the cylindrical section. Cut off the cone part as neatly as possible.
Step 3: More assembly
Cut off a piece of the two inch wide foil tape.
[People have asked, what kind of tape? What brand? I use Duck Brand Aluminum Foil Tape, made by Henkel USA.]
Apply it to the peroxide bottle just above the bottom bulge. Make sure it is even and smooth. You can polish out any wrinkles with the bowl of a plastic spoon (don't use a metal spoon, you'll tear the foil). Cut a 1/2 inch wide strip of foil tape about six inches long. Apply this across the center of the bottom of the peroxide jar. Smooth the ends evenly against the side foil. It is very important the bottom strip makes good contact with the sides. The bottom strip is your ground connection.
Step 4: Final assembly
Fit the cone top back onto the peroxide bottle. Keep it in place with a strip of electrical tape.
A rubber band around the outside foil makes it easier to connect wires to the jar.
Step 5: Charging the Leyden jar
Update: I measured the capacitance with a handheld digital meter and got consistent results of 00.32 nF (that's 320 pF) for this model Leyden jar. A variant of the Soda Can Leyden jar made with polypropylene bottles rates as high as 00.50 nF (500 pf).
Connect the outside of the jar to a ground, such as metal stove top or metal water pipe. Run a connecting wire from your charging device (a Wimshurst machine, Van de Graaff, ion generator, etc) to the center brass post. The jar will take on charge until it reaches capacity. It may arc over (spontaneously discharge) if over filled.
You can also charge these jars from TV screens, friction rods, and any other source of static electricity.
Stringing a number of these jars in parallel will create a *very* powerful capacitor bank! Be sure to discharge the jar with a U-shaped piece of wire held in an insulated handle. You will get loud, powerful sparks from this device. Leyden jars can recover charge if left sitting, so for safe storage short out the jar by clipping a wire to the center electrode and having it touch the outer foil coating.