Standard Mouth Flex Cap

When your original cap wears out or you just want a spare, this is the replacement we recommend for Standard Mouth Hydro Flask owners. Honeycomb Insulation built into the lid holds temperatures longer, while the flexible TPU strap with stainless steel pivots gives you a solid carry handle that moves without binding.

• Honeycomb Insulation built into the cap itself adds an extra layer of temperature retention — keeps cold drinks colder and hot drinks hotter longer
• 100% leakproof seal means you can toss it in your pack, bag, or duffel without a second thought
• Flexible TPU strap with stainless steel pivots swings freely with your movement — no binding, no awkward grip
• Fits all Hydro Flask Standard Mouth bottles — works as a direct replacement or a style upgrade on any bottle in that lineup
• Dishwasher safe, BPA-free, and phthalate-free construction — easy to clean, safe for daily use