"You got the Fill-Up Coupon! It will fill every item you have to the max! Give it to Beedle, but remember: it doesn't cover all of his products... Keep it in your Delivery Bag for now."
The Fill-Up Coupon is mailed to Link from Beedle after Link has purchased 60 items from him. After his 60th purchase, Link will be able to find the Fill-Up Coupon in any Postbox. The Fill-Up Coupon is a one-time use item. When given to Beedle, Link will receive a free replenishment for all consumable items, such as Bombs, Arrows, as well as a full recovery of Hearts.