Wide Mouth Flat Cap Fits Hydro Flask Bottles<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Wide Mouth Flat Cap for Hydro Flasks Wide Mouth water bottles.</li><li>Replacement cap compatible with both 18oz， 40oz and 64oz Wide Mouth bottles.</li><li>Made from polypropylene (PP#5) which means they are BPA-Free</li><li>The Lifetime Warranty makes Hydro Flasks the best water bottles</li><li>Please note that the Flat Cap does not fit on the older style Wide Mouth flasks. Only compatible with Hydro Flask Bottles.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31NMLyqQ%2BUL.jpg" noproxy>