When in use, remove the top cover from the box, then grab the upper part of the cup and pull open the cup body, tighten firmly, keep the cup upright, and make sure the cup is taut and drinking liquid before filling. This folding water cup is a suitable for the travel, hiking, camping and other outdoor activities and concerts. Perfect if you fancy a quick tipple while you’re on the move, this little stainless steel cup folds down into a case on a key ring! An ideal accompaniment to a hip flask, the fold away cup makes it much more convenient to enjoy a tot of warming brandy or whiskey while you’re out and about in chilly weather. Great for in your backpack, glove box, tackle box, boat, etc.This product is not insulated because of the thermal conductivity of stainless steel.