Lockable insulated cup sleeve (12 oz - 354 ml)

This sleeve, designed for 12oz (354ml) cardboard cups, helps keep your coffee or drink warm for longer. Its twist-lock bottom activates a mechanism that securely holds the cup in place, preventing any spills.

It features 5 easily printable parts and one rubberband in the bottom that can be installed at the assembly. See last picture.

This is the perfect accessory for anyone who gets their daily coffee in a 12oz cardboard cup.