Each year, 11 million tons of plastic enter the ocean, threatening marine life and ecosystems. We propose a passive floating device that requires no external energy (no motors, no batteries). It uses a vortex chamber (powered by ocean currents and wind) to separate visible plastic debris and a triboelectric belt (charged by water flow) to attract microplastics. The device can be built from recycled plastic and common materials, with an estimated cost of $30‑50 per unit. This paper presents the theoretical concept, key components, and potential deployment in harbors, river mouths, or sheltered bays.