This article contains plot details from the latest book.
Lushberry Juice is a type of Elvin beverage that is favored by many children. Although adults drink it as well, as shown by the time Sir Faxon snorted it all over himself in reaction to "The Great Cape Destruction." It is kept in a bright green bottle, which is seen both when Edaline conjures it, as well as when it was in a midterms bubble. It can be noted that Dex slipped a balding elixir in Stina's juice as mentioned in Book 1: Keeper of the Lost Cities. It is served in the Foxfire cafeteria and is mentioned to be good for washing down bad tastes. Later, in Flashback, Flori had rigged a dummy for Sophie, under Sandor's leadership to appear as blood to give a more life-like effect. She had also done this for some of Sophie's friends when they had wanted to get in on the training with the experienced five bodyguards.
It is possible that there are multiple types or flavours of lushberry juice, as in Book 2 lushberries are used to make custard bursts that are purple with pink juice, but Sandor uses it as fake red blood in Flashback.￼It may change color when cooked as lushberry custard bursts are pink and purple.