JuJu will not give you thrush.
Using a menstrual cup such as JuJu is better than disposable tampons because it contains no bleaches, deodorizers or absorbency agents. It does not interfere with your healthy vaginal environment, and will not cause irritation, and will not deposit fibers in your vaginal wall.
Approximately 1/3 of what tampons absorb are the protective secretions that prevent thrush and other infections from happening. These secretions also maintain the correct Ph balance of the vagina. When you use your JuJu it will not interfere with these protective vaginal secretions, and it will not absorb them either, so your vagina will remain healthy whilst you are having your period. It is important to rinse your JuJu with plenty of water if you use soap to clean it, as traces of soap left on your JuJu menstrual cup can upset the Ph balance of your vagina.