Heartbeat 18 oz Steel Bottle Physics See how many you can

See how many you can identify tonight

Right before the fireflies come out

your friend the entomologist

or look at the problem from a different angle to see if you get better results

Here's a notebook that's as smart as you

Heartbeat 18 oz Steel Bottle Physics See how many you canStudy your cardiac rhythms while keeping hydrated! Nicer looking than an EKG pocket guide, this Heartbeat Flask is both functional and aesthetic. Fill it with ice cold water and take it to the gym for your cardio workout, or top it off with coffee for a long night shift in the cardiac ward. With a textured design for a unique tactile experience, this flask will keep your drink hot or cold until you're ready to enjoy it.