Some plans include coverage of OTC items and health-related supplies. For those plans that include this benefit, members are provided with a monthly or quarterly allowance to obtain the items and supplies. For plans with a quarterly allowance, the benefit replenishes at the beginning of each quarter and carries across quarters, but any unused portion of the benefit does not carry over to the next year. For plans with a monthly allowance, the benefit replenishes at the beginning of each month, but any unused portion does not carry over to the next month. OTC products are described in a printed catalogue available to members.