It's easy to keep water in an upside down container with nothing but a card. However, only those possessing extreme skill can keep the
water from falling out when the card is removed. Are YOU skilled enough? Truly an amazing sight - IF you can get it to work!
Still having trouble getting water to stay in an upside-down container? Haven't figured out how to remove the card 'just right?' Here are some hints and tips that will help!