Australian Glass Manufacturers Siding, which is also known as Koala Siding, was a railway siding on the South Gippsland line in South Gippsland, Victoria, Australia.
The siding was the last new siding on the line, being opened during the 1960s. It was the last source of traffic on the line after the withdrawal of the Leongatha passenger service on 24 July 1993. By the mid-1990s, only T, Y and P class diesel locomotives were used on the line due to their low axle loads, with a 15 km/h speed limit applying to parts of the track. The track between Nyora and Lang Lang has been proposed for an extension for the South Gippsland Tourist Railway. This continued until 16 January 1998 when the sand train to the AGM glass works at Spotswood station ceased operation.