Could it be? Was marijuana the source of inspiration for Nikola Tesla's invention of alternating current (AC) electricity? Probably not, but any stoner knows that the green goddess can incite waves of creativity when you're stuck in a mental block. This 5-inch metal ashtray is perfect for everyday smokers who want to get their creative juices flowing. You may not be working on one of the most important electrical engineering inventions of our time like Tesla, but this round, outdoor ashtray is extremely portable and durable to fit with modern busy lifestyles.