In Depth Study:

BU Roll Buyer's Guide

Image 3: Coin tubes.

There are a number of containers for holding a roll of coins.  Coin tubes (see Image 3) made of sturdy plastic with either screw on or snap on caps are often used for more expensive rolls as they provide better protection.  Due to the expense these are not used by banks but rather are exclusively collector-used products.  Hence, they are an after-market addition to the roll.