Get your hands on a wigwag bubble cap that fits up to 25mm and 30mm buckets. The bubble cap has been changing the smoking game and is quickly becoming a required item for the most avid smokers. Due to the design and ability to restrict airflow and allow you to control it, you can get the most savory hits, every time! The wigwag bubble cap compliments just about any light colored scheme when it comes to bongs and dab rigs.