Anthony Gambus is the man who designed this Diffuser. He is an industrial designer with a focus on consumer products with ergonomics and technology as the focus. His motto is always to cut ideas and be creative in all areas. This Product contains 115 ml and it lasts about 4 weeks depending on how many sticks you have in and if it is in a place with a lot of drafts. Included within this set is a pure white tea diffuser refillHave any questions about Maison Berger? Simply click here to go to our Maison Berger FAQ page./We apologise that Maison Berger products are not available for delivery outside the UK.