The Hydro Flask Hydro Flip Cap (Wide) is built with a convenient rubber stopper that plugs the opening to prevent spills when you’re not using your bottle. The cap makes it easy to drink hot beverages like coffee or tea. The Hydro Flip Cap fits the 18 oz Wide Mouth and 40 oz and 64 oz flasks.
- Made from 100% recyclable PP5.
Note: The Hydro Flip Cap does not fit on the older style Wide Mouth flasks.