- Durable Straw Lid for Standard Mouth: This straw lid is an ideal replacement for your Hydroflask standard mouth bottle. Featuring a sturdy handle, it ensures easy transport without the worry of accidental drops. - Convenient One-Handed Use: Effortlessly open and securely close the lid with just one hand. The flip-top design allows you to sip directly from the straw, making it perfect for indoor and outdoor activities like sports, camping, and hiking. The wide finger loop provides comfort and portability for on-the-go hydration. - Compatibility: This straw lid is designed to fit Hydroflask standard mouth bottles of 18, 21, and 24 oz (mouth diameter 1.91"). It is also compatible with Simple Modern Ascent, The Coldest Water Standard Mouth, and Klean Kanteen Classic bottles. Please note that it is not compatible with wide mouth Hydroflask models (12 or 18 oz), only fits standard/small mouth bottles. - Value Package: Comes with two reusable straws and a straw cleaner to ensure hygiene and longevity. Made from high-quality, BPA-free materials, this durable straw cap is safe for both adults and children. Choosing this sport cap as a replacement lid is a practical and economical choice for daily hydration.