Osto MIST Odour Neutralising Tangerine Drops Osto MIST Odour Neutralising Drops are scented oils that are specially formulated to neutralise odour in faecal stoma pouches. They contain a powerful nanozyme which effectively eliminates pouch odour, giving you confidence & peace of mind when going out & about. Osto MIST Odour Neutralising Tangerine Drops have a totally tangy tangerine scent. Each 25ml bottle contains over 400 drops of oil. Osto MIST Odour Neutralising Drops are also available in Vanilla Bean, Gardenia with Jasmine & Mint.