|Released||24 July 2006 (Update)|
|Quest item||Lunar Diplomacy|
|Examine||A vessel with water and Guam inside.|
|High alch||0 coins|
|Low alch||0 coins|
A guam vial is made by using a guam leaf on the empty vial after water is poured into it, which grants 84 Herblore experience. It is the first step of creating the Waking Sleep Potion, necessary for accessing the Dream World in the Lunar Diplomacy quest. The second step is to use the guam vial with a marrentill to produce a guam-marr vial.
An alternative process is to create a marr vial first, and then add a guam leaf to produce a guam-marr vial.