Help with a pill container?

So I have a friend who has an illness and invade of an attack he has to take these pills so since I'm always around him his parents gave me 6 pills to keep with me just in case and I need a case that won't turn my pills to dust if it's around a necklace or on my belt, please help o and the pills are about the same shape as exedrin migraine but a little smaller and have a more powdery texture