Discounts for multiple purchases are welcome. No price reductions other than the multiple purchase discount. I only did a patch test on the back of my hand once. I have not used it on my lips. Almost the full amount remains. Expiration date: Please refer to the photos. Shipping via anonymous delivery with a tracking number. Due to the thickness, the product will be removed from its box, wrapped in bubble wrap, and placed in a bag. The box will be folded and included. Thank you for your understanding. - Model name: 3D Volumizing Tint 03 - Country of manufacture: South Korea