a line storage device prevents a line from becoming entangled . a channel formed in a piece of material defines a non - overlapping zigzag pattern . the line is laid in the channel and extends from opposing ends of the piece of material . the material supports the line in the channel until the line attains a threshold tension at which point the piece ruptures sequentially along the zigzag pattern from each opposing end . the channel can be formed in or on one or more surfaces of the piece of material .