Nope! I actually don’t even use a vacuum sealer. While it does give you a more even fit around the food, I honestly just don’t have room for another appliance in my pantry. You can use a water displacement method to vacuum seal your filet mignons using just a bag and the water that you’re cooking in. You can use a gallon bag, sous vide bag, or even a reusable silicone bag. Check out the link for a more in-depth description, but in short, you’ll want to lower the bag into the water while pushing any air out that you can. Once the filets are under water and you’ve squeezed out as much air as possible, you’ll seal the bag.