Mighty Mug Solo Tumbler, The Travel Mug That Won&Otilde;t Fall, with BPA-free Plastic, Lilac, 11 oz Wont fall over when when bumped into, but lifts 100% naturally. Smartgrip function never wears out and is guaranteed to work on any smooth, flat surface (i.e. your work desk or table). Ideal for all single serve enthusiasts Avoid ruining important documents and sip around your electronics worry-free Double wall, sweatproof mug with slim design fits nicely in your hand Conveniently fits under Keurig and other single-serve coffee machines and into car cup holders. Grips firmly on boats, trains and planes