Guru Multi Riddle, The Guru Multi Riddle has been designed to fit perfectly on Guru and Mainline Match 17L buckets but will also fit on other buckets of this size. The riddle locks onto the bucket so its safe and secure, making it extremely easy to use. The bucket lid also clicks back onto the riddle securing it further. This feature is unique to the system and makes transporting the bucket, riddle and lid very easy and efficiently without worry of spilling the contents inside.