High quality ------ wide mouth hydraulic straw cover, made of high quality material, does not affect your taste. They are BPA-free, safe and healthy, and easy to clean and maintain healthy with BPA-Free. Excellent design ----- The rocking nozzle can help you drink more easily than others. Make sure the inner rubber seal is inside the cover liner before use to prevent leakage, turn the top upside down, drink with one hand. It is not necessary to unscrew the straw plug. Compatibility ------ Perfect for wide opening water bottles for Hydro bottles (12 oz, 18 oz, 21 oz, 24 oz). suitable for cups with a mouth of about 1.81 inches. Suitable for most . Straws can be cut according to your needs ----- standard size straw cap for standard hydraulic cylinders, simple and narrow bottle, standard cold water bottle, for classic Kanteen, standard saliva moisturizer and 24 ounce sink, perfect for the hydrating needs of the Mobile Solution. Material:plastic colour:As Shown Package Contents: 1 x bottle cap 1 x straw Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.