Do you need durable yet convenient leak-proof caps for water bottles? If yes, then this product can be used as good choice for you. The caps are reusable and suitable for replacement use, leak-proof and reliable, made of plastic material, durable and practical. Features -Color:As Shown -Material:Plastic -Size:5.50X5.00X5.00cm/2.16X1.97X1.97in -Inner diameter: 4.5cm -Leak-proof design: effectively prevents any leakage when the cup is inverted, keeping your cup clean and dry. - Stable and practical, these water bottle caps have , excellent and useful, universal and reliable for home use. - These water bottle caps have good sealing effect to ensure that the water will not splashing, leak or spill. - Made of plastic material, these water bottle caps are healthy, excellent and durable, lasting service life. - Simple and modern design, easy to tighten, very practical and convenient for vacuum water bottles use. Package list: 2 x bottle ​cap