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Oh no, lost the lid for your favorite Hydro Flask bottle? Don't despair, the Hydro Flask Standard Mouth Flex Cap is here to keep that baby going strong. Fits all Hydro Flask standard mouth bottles.
BPA-Free and Phthalate-Free
Honeycomb Insulation™ – Helps keep cold drinks cold and hot drinks hot.
Durable, Stainless Steel Pivots
Compatible with All Standard Mouth Bottles