Our 10ml glass roller bottles are tinted cobalt blue to protect the essential oils from the sun’s UV rays. Each bottle has a steel roller ball that allows for quick application and a plastic lid to prevent spilling. Our unique labels list the ingredients as well as the directions for application. Ingredients: OnGuard blend, Lemon, Oregano, Melaleuca essential oils, fractionated coconut oil. Apply to chest, throat and bottoms of feet as needed. The Flu Bomb is not for everyday use (if used everyday it can actually lower your immune system). It would be ideal to use if you know you’ve been around someone with the flu or flu-like symptoms, or if you are experiencing symptoms. Oregano is a hot oil so be mindful of applying to your neck. Minor irritation may occur.