Transform your favorite tumbler into a convenient, on-the-go drinking machine with the Hydro Flask 22 oz Tumbler Straw Lid. As always, the HydroFlask® Honeycomb Insulation™ helps keep your drinks at your desired temperature. Sip on your favorite hot or cold beverage with this durable, splash-reducing straw lid. BPA free and Phthalate Free. Offers extra protection for your Hydro Flask. Fits onto the 22 oz tumbler.