Weaimed to develop an eco-friendly device for marine oil pollution by combining the oil-degrading bacterium Pseudomonas chlororaphis with a biochar filter. A bottle-inspired design was created using 3D CAD, incorporating an insect screen and biochar to optimize water flow. Laboratory tests confirmed the concept, though real-environment validation was limited. The results highlight the potential of microorganism–biochar technology for oil remediation and suggest future improvements with additional filters and field testing.