Hock Ann Seng Industries Pte Ltd is a company based in Singapore which organises the cleaning for reselling & reuse of industrial containers such as metal drums, plastic drums, Intermediate Bulk Containers (IBC).

Hup Lee Leong is a company based in Singapore specialised in the collection and sorting of scrap metals such as Ferrous and Non-Ferrous Scrap and some general waste (wood, plastic, rubber...).

Metal Link Hardware Pte Ltd specialises in the buying and selling of all types of scrap metal - from ferrous to non-ferrous metals.

P&R Resource Management Pte Ltd organises the collection and transportation of glass waste from F&B and industrial sectors across Singapore. Once collected the glass is sent to a sorting facility in Malaysia, in Pasir Gudang (next to Johor Bahru), where the glass cullet is cleaned and sorted by colours. The sorting facility is operated by PUM Group. From there, the sorted cullet is sent to glass manufacturers.