Mighty Mug has become more portable with the introduction of the Mighty Mug Solo. This genius travel mug serves up a single cup of your favorite beverages and uses Smartgrip technology to avoid spills when taken on the go. - Mighty Mug Solo Travel Mug is ideal for all single serve enthusiasts - Smartgrip technology grips when you accidentally knock it, lifts naturally, and never wears out - Fits perfectly under most single serve coffee machines - Car cup holder friendly - Made of double wall plastic - BPA Free