Our patented Roaster™ cap is designed for sipping, drinking or chugging. Plus, it's made with ThermaGrid™ waffle insulation to help keep your drinks hot up to 12 hours – no matter what the temperature is outside. Compatible with reusable straws (.25" diameter).
Features: • Made with multiple layers of ThermaGrid™ waffle insulation to prolong thermal protection • .25" (6.5mm) straw compatible • Compatible with all Wide Mouth bottles • Leak free design • BPA-free and phthalate-free • Dishwasher safe • Patented • Lifetime warranty.