【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 and Health】 Made of high-quality PP, all materials are free of toxic substances such as BPA, lead, PAES, etc, ensuring the freshness and taste of the beverage 【Leak Proof】The sealing ring design of the replacement cover is very perfect, with good sealing and stability, which can prevent beverage leakage and keep your backpack dry and tidy when you go out 【Convenient to Drink】The large hole design of the lid allows for quick sipping, and the flip can be fixed in place, so it won't block the view when drinking water 【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 Replacement Flip lid for Hydroflask Wide mouth water bottle