Keep in a cool, dark place or in the refrigerator if you prefer. Basically as long as your e-liquids are out of the sunlight they will be fine. You must be minimum 18 years of age to purchase or use. Nicotine in its pure form is a poison and can cause harm. All nicotine fluids must be kept in a safe place away from children & Pets. In case of accident, or if you feel unwell seek medical advice immediately.