My first vape was built be me in the mid 90s when I was about 15. I used a box, a soldering iron, a mason jar, and a steel socket for the bowl. It actually "worked" (100% conduction), but tasted so awful I abondoned the concept of vaporizing entirely! Clearly it wasn't a fair assessment of the concept as my materials were rubbish, my research was laughable, and my herbs were shwag.
Fast forward about 14 years and I rediscovered vaping by way of the MFLB, my first vape purchase. I rarely use it anymore but will love it forever