My oldest son had one of these the other day, and I had to get one. We have all been trying to cut down on using straws and trashing the enviroment. This is a good start. It folds up into 4 sections and slips into a small carring case. It has a rubber end on each end, and the rubber tube runs from one end to the other. It is covered by metal sections that all lock together when you open it up to full length. Just open, sip, then fold it up and return it to it's case. There is a brush included to clean it with.