... , durable silicone meterial . 2,odorless and non-toxic water seal ring for water bottle 1,eco-friendly , durable silicone meterial 2,odorless ... and non-toxic3,water-proof and oil-proof 4, ... ,soft ,flexible6,RoHS/FDA approved7,usage:waterproof and prevent water seeping out8,high quality ,competitive price9,good service, fastest ...