The Natural Way
Have a tree with sturdy branches? Great. All you have to do is slip a couple of bottles (of cobalt blue, ideally) onto each end. Boom. Instant bottle tree. Let nature do its thing.

DIY Route for the Handy Folks
If you are more of a maker type, consider this:
Steel Frame: Can be made into the figure of a tree by welding two or more steel rods or pipes together.
Cobalt Blue Bottles: Start collecting. Thrift shops are goldmines. My friend basically lives there! And finds so many awesome stuff.
Bottle Bush (Optional): A device to secure bottles in position.
Park the stuff as all get-out, stick those bottles on, and voilà — a modern-day spirit trapper slash art piece. The only thing is, don’t be surprised if the neighbors slow down to ask what it means. (Now you’ll know.)
Here’s the thing: As you already know this these trees are more than just decoration. It’s history, culture, and spirituality. Fascinating, right?!
So the next time you see a bottle tree, wait, take a break. Look. Listen. Let yourself wonder. Because behind that glint of blue glass is a story centuries high. And now? You’re part of it.