【Unopened, Unused】 CoolHits 8L Water Jug (for cold and hot retention). I purchased this about 10 years ago, but I'm selling it because I no longer need it. It can be used for outdoor activities, lessons, etc. I took it out of the box to check the condition, but the plastic wrap is unopened. The instruction manual is also included, but the cover is dirty. Please be aware of this. Due to the deterioration of the original box, I plan to ship the product with cushioning material in a new cardboard box.