【Fits 2.28" Wide Mouth Bottles】Designed to fit 2.28 - inch outer diameter (58mm) threaded bottles. It's an ideal choice for 12 - 64 oz Hydro Flask, ThermoFlask, Takeya, Iron Flask, Simple Modern, and Hydro CELL wide - mouth models. However, please measure first to ensure your bottle's outer diameter is exactly 2.28 inches for a proper seal. ✱✱Please Note that this lid is NOT suitable for TAL, Hydrapeak, Hydro Flask Growler or Nalgene and narrow mouth bottles 【Safety & Durability】Constructed from high - grade, upgraded PP, BPA - free lid ensures family - friendly safety. It preserves drink purity, resisting accidental drops for long - lasting use 【Comfort - Oriented Design】The newly - designed smooth spout offers a pleasant sipping experience. The ergonomic two - finger handle simplifies carrying, enabling easy hydration on - the - go 【Hygiene & Leak - Proof】The spout cover safeguards against contaminants, ensuring hygienic sips. A reliable leak - proof design means worry - free backpack storage, keeping your belongings dry during any activity 【Professional Services】Prurex is a professional service provider. We focus on solving water bottle accessory problems and offer 18 replacement - lid - like products. If you're unsure about the compatibility, please contact Prurex to ensure a pleasant experience Spout lid for Hydro Flask Wide Mouth and 2.28" wide mouth water bottle