When you see Thais sniff on something in public, you may think it's a drug. Actually, it's most likely just an inhaler, called ya dom in Thai. Let's find out what these inhalers are all about... You have probably tried an inhaler to relieve a blocked nose, which is the most common usage in the West. However, in Thailand the inhalers are not only used to relieve nasal congestion, they are also widely appreciated for their refreshing and energizing properties. As a result, inhalers are very popular and available in a wide range of brands. In addition to conventional inhalers, where cotton is infused with essential oils, many Thai inhalers come in liquid form or are made of small pieces of dried herbs, that have been soaked in essential oils. These inhalers come in roller bottles, regular bottles and jars.