Citronella sticks are a common form, coming in citronella-impregnated plastic "repeller sticks". Citronella oil is popular as a natural insect repellent. Also there are various organic, botanical repellents such as citronella oil and neem oil. The scented blooms are sometimes compared to citronella. Types of corrective collars include vibration, citronella spray, ultrasonic and electrostatic/shock collar. The essential oil is commonly co-distilled with lemon oil, citronella oil or other oils. It is a colorless oily liquid with a citrus odor similar to citronella oil. Some aids deliver an aversive such as a spray of citronella when triggered. Besides oil production, citronella grass is also used for culinary purposes, as a flavoring. It is the primary component of rose oil, palmarosa oil, and citronella oil. Sueyoshi is famous throughout Japan for producing Yuzu (a citronella). However, natural citronella oil and its derivatives are preferred by the perfume industry. Processed goods include white clay ceramics, dried fish, raw gulaman, and citronella oil. Some residents are buying a potted plant called Citronella and placing it at their home. The US Food & Drug Administration considers citronella oil as generally recognized as safe (GRAS).