Add a custom design to your Firelight Flask® in minutes. Engraved and shipped within 5 business days. The Firelight Flask® comes in two sizes—750ml and 375ml. The 750ml version is a 3-piece bar set designed for sharing, featuring two integrated tumblers and a vacuum-insulated flask that holds an entire bottle of your favorite spirit or cocktail. The 375ml version offers the same premium quality in a more compact size, with one integrated tumbler, perfect for enjoying your favorite drink wherever you go. Create the perfect gift or a one-of-a-kind item to cherish by adding a personalized laser engraving to one of our premium flasks.