A classic ITC design, first patented in the 1980s (patent #4,828,211) and still popular today. The adjustable arms slide out to hold anything from slim cans to large insulated tumblers securely.
A metal spine reinforces it and keeps the arms firmly engaged. When you're not using it, it folds closed to just ¾in.
Housing: plastic (gelcoat white)
Patented adjustable arm design (Patent #4,828,211)