I buy large ones and split them down the side. you can squeeze them open like a coin purse, and clean them out with an apple corer. It's a little more work, but is more aesthetically pleasing than trying to keep two separate halves together. I then fill them with a Ziploc bag-turned-piping-bag. One toothpick securing bacon end at the bottom, tight wrapped spiral of bacon to the top, and another toothpick.