Due to international airline regulations, liquid products cannot be shipped via international courier service such as UPS or Fedex but only via Hong Kong Post. In order for you to receive your products as soon as possible, we ship liquid and non liquid products separately should you order products from both categories at the same time and opt for Express shipment for the non liquid products. In case you buy liquid and non liquid products at the same time and choose Economy Shipment for the non liquid products, both product types will be shipped at the same time, with the same forwarder but separately.The shipping time for shipments with Hong Kong post which we use for liquid products is 8-18 working days. The shipping price for shipping with Hong Kong post is already allocated to the product cost for all liquid products. Products classified as liquid (or hazardous) products are liquid ink, ink sticks, water colors and seal paste.If you check out and have both - liquid and non liquid products in your cart, the shipment options you can choose from during checkout (Express & Economy) are only applicable to the non liquid product(s) in your cart. The weight of the liquid product(s) in your cart will not be calculated and does not affect the shipping prices you can choose from between Economy and Express shipment - since we already allocated the shipment cost of the non-liquid product to its sales price before.