A cross-section of an oak tree reveals concentric rings rendered in precise, radiating lines in black ink against a clean white ground. The intricate linear patterns emanate from the center, capturing both the geometric precision of growth and the organic irregularity of nature's annual record. Sewn from a durable canvas-like exterior with a soft lining and made to order, in three sizes up to one that fits a tablet. A catchall for toiletries, art supplies, or small electronics, carrying an independent artist's work instead of a plain zip bag.