There are several places in Australia where you can buy lip essence. Here are a few options:

1. Sephora: Sephora is a globally recognized beauty retailer that offers a wide range of skincare products, including lip essences. You can shop online or visit their physical stores in major cities across Australia.

2. Mecca: This is another popular beauty retailer in Australia. They also have an online store and physical outlets in various locations.

3. Priceline Pharmacy: Priceline is a leading health and beauty retailer in Australia. They offer a variety of lip care products and you can find them both online and in-store.

4. Adore Beauty: This is Australia's online beauty store that offers free shipping. They have a wide range of beauty products, including lip essences.

5. Chemist Warehouse: This is one of Australia's largest pharmacies. They offer a variety of skincare products at a discounted price.

Remember to check the ingredients of the lip essence you choose. Look for hydrating ingredients like hyaluronic acid, ceramides, and natural oils. Avoid products with potentially irritating ingredients like artificial fragrances and certain types of alcohol.