Thank you very much for viewing my product from among many others. My son used this for about 2 years, but the zipper hardware came off... so I'm selling it. You can pinch it with your fingers to open and close. It shows signs of use, but there are no holes. Since it has his name written on it, I plan to cover it with a marker. THERMOS HYDRATION bottle cover, with a zipper, making it convenient to carry. - Brand: THERMOS - Model Name: HYDRATION - Zipper: Yes - Bottom: Green rubber material This is a junk item, so please refrain from purchasing if you are sensitive to such things... I will ship via Yu-packet Plus or Takkyubin Compact, so I will fold it slightly. (See the last photo) For those who understand the above and need it ♫ Thank you for your consideration.