To commemorate and celebrate the warmth and close ties between the two countries, Singapore Post and Postal Services Department, Ministry of Transport and Infocommunications, Brunei Darussalam have collaborated to release Singapore-Brunei Darussalam Joint Stamp Issue. Featured in this joint stamp issue are Dendrobium Hassanal Saleha orchid named after the Sultan and Raja Isteri during the Sultan's State Visit to Singapore in 2022 and Ficus elastica was planted by President Tharman on his first overseas State Visit to Brunei Darussalam in 2024.

Dendrobium Hassanal Saleha The Dendrobium Hassanal Saleha orchid was named after Haji Hassanal Bolkiah Mu'izzaddin Waddaulah, Sultan and Yang Di-Pertuan of Negara Brunei Darussalam, and his wife Raja Isteri Pengiran Anak Hajah Saleha, during their state visit to Singapore from 24 to 25 August 2022. This hybrid's royal magenta hues are colours of royalty – a tribute to the Sultan, and marking Brunei Darussalam's enduring ties with Singapore. This was his fifth state visit to Singapore since the first in 1990, building on a foundation of bilateral ties first laid by founding Prime Minister Lee Kuan Yew and the Sultan's father, Sultan Omar Ali Saifuddien III.

Ficus elastica Ficus elastica is an ornamental tree, popularly known as the Rubber Tree or Rubber Fig. The plant can reach heights of over 30 meters in its natural habitat, but typically grows much smaller indoors, around 2-3 meters. This plant has large, glossy, dark green leaves with a burgundy tint. In addition to its ornamental value, the plant is considered a natural air purifier that can help boost mood and overall health.

In Singapore and Brunei Darussalam, the history of the rubber industry is particularly notable. Both countries played pivotal roles in the global rubber industry in the early 20th century, with numerous plantations that significantly contributed to their economic growth. The rubber industry's boom in these regions helped drive infrastructure development and employment. While the rubber industry has diminished over the years, the legacy of this era remains evident. In Singapore, Ficus elastica or 'Rambong' serves as a symbolic reminder of this period, embodying both the country's botanical heritage and historical economic significance. Similarly, in Brunei Darussalam, the history of rubber plantations is a testament to the country's contribution to the global rubber market and its impact on the local economy during that time.