Thank you for viewing our products. The product condition is fine, and I believe there are no noticeable stains. I have inspected it myself, but I think it's clean, so thank you for your understanding. No pre-cooling required. Amazingly easy to make in just 1 minute. Unsweetened drinks are also OK! You can arrange any drink and enjoy endless fun with a DIY feel. Discover new deliciousness every day with 15 different ice textures to choose from. A must-see for those who want to DIY frozen drinks at home or want to make them quickly! ICEMAGE delivers a new frozen experience that will enrich your diet!