Duplo box was developed to help the clinician and dental technologist in making a new denture using the existing denture. This technique is known as copy denture technique. Copy denture technique started in 1970’s and since then, it developed into various procedures. Neuromuscular adaptation on new denture can be achieved faster and easier using this technique due to better accuracy of the polished surfaces. Various technique of copy denture have been introduced, however confusion regarding the method still exist among clinician and dental technologist. Unlike the other techniques, usage of Duplo box does take into consideration from the aspect of cost savings, the ability to use various impression material, and easy handling. Most of current practice, the clinician usually use soapbox to duplicate the denture which have a few drawback. Therefore, Duplo Box was invented to solve this problem and can be used as a standardized instrument in duplicating process. patients, it might causes difficulties in performing ablution and prayer as it involves a lot of movement.