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Apple and Nike Alums Behind Vessyl Launch a New Device That Unlocks the Truth About Your Personal Hydration Needs

Pryme Vessyl, now available in select Apple stores, automatically tracks your unique hydration needs and pairs with the Apple Health app and Jawbone UP so you can perform at your peak

San Francisco, CA – WEBWIRE

SAN FRANCISCO, CA November 17, 2015 – Today, Mark One announces the launch of Pryme Vessyl, an intelligent cup that takes into account a variety of personal factors to determine each user’s hydration needs throughout the day. Pryme is available for purchase today for $99 in select Apple retail stores in the U.S. and Canada and online at and

Pryme’s development team boasts top experts in engineering, health and product manufacturing. Hamid Mohammadinia, head engineer on Pryme, led Design for Manufacturing at Apple for products such as the iPod and all three generations of the iPad. Jason Mayden, former Senior Global Design Director at Nike for Jordan Brand, was in charge of Pryme’s design. This pair teamed up with Dr. Hanson Lenyoun, formerly of Genentech who earned his MD at Columbia University, to develop a product aimed at debunking the myths around hydration, and helping consumers stay mentally sharp and physically strong.

Pryme automatically tracks your water consumption and incorporates this data into Mark One’s proprietary hydration algorithm to let you know your hydration needs at each point of your day. Many of us still follow the 8 cups per day, one-size-fits-all approach to water consumption, but everyone’s hydration needs are unique--fluctuating day-by-day, and even hour-by-hour. Pryme captures a variety of factors such as height, age, weight and sex, as well as changing variables like sleep and exercise, to help you understand your personal hydration needs. Compatible with the Apple Health App on iOS and Jawbone UP, users can easily and accurately track physical activity, and address their hydration needs with equal simplicity.

Setting up Pryme is simple--just download the Pryme app, and enter a few facts about yourself, such as your birth date and sleeping habits. From there, Pryme automatically tracks each sip and continuously helps you stay at your optimal hydration, or being at your ‘Pryme.’

Your Pryme level is represented by a dynamic line illuminated on the side of the cup that rises and falls based on how well you are meeting your needs. To activate the Pryme display, simply pick up and tilt the device. For even more detail, you can open the app and find insights on how to get to--and stay at--your ‘Pryme.’

“It’s clear that a marathon runner will have different hydration needs than a sedentary office worker, yet as a society we’re content with relying on the myth of eight glasses of water per day, regardless of lifestyle,” said Nic Barnes, Head of Brand for Mark One. “We developed Pryme to help you understand that it’s not about how much you need in a day, it’s about how much you need right now. At your Pryme, you are mentally sharp and physically strong. We want you to Pryme for your moments of greatness.”

Using wire-free charging, the 16 ounce Pryme lasts up to two days per charge, and is durable, spill-resistant and made from premium materials for worry-free use.

Mark One came onto the health technology scene last year generating mass excitement for its debut product, Vessyl. Vessyl is the first device that automatically senses any beverage that is poured into it and informs the user of its nutritional contents, then tracks and aggregates this information over time. As Vessyl is still in development, the company has decided to launch Pryme--inspired by one of the most popular and desired features of Vessyl, the Pryme hydration metric. Mark One is offering Pryme as a complimentary gift to all Vessyl pre-order customers and has begun shipping the first batch of these devices today. Pryme is available online and exclusively in select Apple retail locations today for $99.

To take control of your hydration and ‘Pryme’ for your moments of greatness, visit: or

About Mark One
Mark One is a consumer brand that builds desirable products which engage, inform, and inspire you to make healthier choices. The creators of Vessyl, the world’s first automatic nutrient tracker, are addressing myths about hydration using Vessyl’s most popular feature: Pryme. Pryme is a personalized, dynamic estimate of your unique hydration needs. Taking into account your consumption, activity, personal metrics, and more, Pryme Vessyl automatically tracks your unique hydration needs to help you perform at your mental and physical peak. Mark One is based in San Francisco, CA.

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