We always combine postage, depending on the weight and your postcode - ask for a total before paying to ensure you're not overcharged. While most orders come to well below our postage cap, even if you've got a huge order you'll pay no more than $12, no matter how many items you purchase (bulk orders of empty glass bottles not included in postage cap). If you'd like a quote email us with your list and postcode. BULK ORDER DISCOUNTS - contact us and we'll see what we can do.