With orders of $25 or more, Amazon offers the Poise Impressa Incontinence Bladder Supports Sizing Kit for $2.99. Clip the $2 off coupon on the product page to cut that to $99 cents. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping.) That's a buck under our mention from October and at least $4 less than you'd pay at a local store. This kit includes two each of three different bladder support sizes, so you can find the right fit for you.

Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.