Why you need this replacement cap Prevents windshield washer fluid from splashing or leaking, helping keep the washer system protected from the elements. A practical replacement that supports the normal function of your windshield washing setup without additional maintenance. What it is and material Made of durable plastic, the car glass washer bottle cap is designed with quality control and careful workmanship in mind to ensure reliable performance. Easy installation The wiper tank bottle cap clicks into place quickly and securely without the need for tools or expertise. It provides a fast solution to old or damaged windshield washer bottle caps and restore normal operation of the washing system. Sealing cover function This is a replacement sealing cover for the wiper tank, helping prevent washer fluid from spilling into the tank and contributing to a smooth driving experience. Use scenarios After damage or wear to the original cap, install this cap to stop leaks and keep the washer system functioning during winter weather. During routine maintenance or when refreshing the washer system, the cap to maintain proper sealing and prevent contamination. When transporting or driving in conditions with dirt, moisture, or debris, use this cap to reduce the risk of fluid loss and keep the reservoir protected.