The 15-Minute Copper Pyramid
This page provides general links to different tools and materials that you might need in order to build your pyramid. I receive a small commission from anything you buy on Amazon, which helps to keep my business going.
2-Inch-Wide Gorilla Tape -- This is the strongest option due to its toughness and stickiness.
2-Inch-Wide Tan Duct Tape -- But if you want the tape to somewhat match the color of your copper pipe, this can also work.
2-Inch-Wide Copper Tape -- This is actual copper tape for those who would like a conductive connection with your copper pipe. I don't know that it would actually be strong enough to hold your pyramid together, though, as I imagine that it could easily tear. You could, however, use regular duct tape on top of the copper tape to give it extra strength, and then you could even tape copper tape on top of the duct tape for appearances, kind of like a copper tape sandwich.
Copper Tubing Cutter -- If you plan on cutting your pipe, you will want one of these.
Deburring Tool -- And if you cut your pipe you will definitely want one of these.
You can also find other tools that might be helpful in building whatever pyramids you might choose to make, including things like clamps, tape measures, squares, drill jigs, wood glue, drills, miter saws, circular saws, and much more on this page here.