The product is an open drinking cup designed to be used in a microgravity environment, developed from Pettit’s desire to drink water without a bag and straw in outer space. “We take gravity for ...

Description: A simple speaker made from a waxed paper cup, a small coil and a Nd-B-Fe magnet. The coil consists of approximately 50 turns of #32 wire, wound on masking tape. A AA battery was used as ...