ADJUSTABLE DESIGN KEEPS BOTTLES IN PLACE: no longer worry about your large cups and bottles rolling around and tipping while driving; our holder features durable adjustable arms that fit beverages 18 to 48 ounces or 2.8 to 5 inches in diameter and up to 12 inches in height; the arms securely grip cups with EVA foam pads for added security to help keep them in place | FITS MOST POPULAR BOTTLES AND MUGS: adjustable arms are sized to fit most popular large beverage containers from coffee mugs to skinny cups, wide mouth water bottles and more; unique open sided design can also accommodate cups with handles | EXPANDABLE BASE FOR SECURE AND CUSTOM FIT: universal design is constructed to fit most round cup holders from 2.6 to 3.7 inches in diameter; features an offset installation option that allows holder to sit off center to avoid obstructions such as center consoles, gear shifters, emergency brakes, and secondary cup holders; may not fit all cupholders, check vehicle’s cup holder dimensions | HEAVY DUTY, LONG LASTING CONSTRUCTION: built for daily use, heavy duty ABS plastic withstands wear and tear; thick EVA foam pads and silicone coaster inside cup holder help protect from scratches while also securely gripping to bottles | INSTALL IN SECONDS, NO TOOLS REQUIRED: simple installation, expander requires no tools or equipment; ideal for use in cars, trucks, golf carts, boats and more; For console cup holders only. Do not use in retractable cup holders