The attached loop-top never gets lost and screws on and off easily. Printed graduations let you keep track of your hydration. Graduated to fourteen ounces but the brim capacity gets us over 16 ounces or 500 mL. Everyday Tritan. BPA-Free. High impact resistance. Resistant to staining. Won't retain odors. Withstands sub-freezing to boiling temperatures. Dishwasher safe away from the heating element. Max temperature: 100°C/212°F. Min temperature: -40°C/-40°F.