Take the customization process one step further with your choice of flame type. Combining the benefits of the Yellow Flame Butane Insert with the unique chimney style of our classic pipe lighter, the Yellow Flame Pipe Butane Insert is designed for optimal downward flame draw for occasions that call for an odor-free flame. All Zippo lighter inserts are designed to perfectly fit any classic Zippo lighter case* (sold separately). For optimal performance, fill with Zippo butane. Made in China.