The design and specifications of the two indispensable items for the Tokyo 2020 Olympic Torch Relay.
Source: Tokyo 2020 Olympic Torch Relay Celebration Cauldron and Lantern

Mining lamps, Davy Lamps, Olympic Flame Lamps
The design and specifications of the two indispensable items for the Tokyo 2020 Olympic Torch Relay.
Source: Tokyo 2020 Olympic Torch Relay Celebration Cauldron and Lantern