Drips will work, several ways of doing this, here's what I have used with good success... Coming from the LFS to QT, first
turn the lights off on the quarantine tank. Place the bag with fish in your quarantine tank and immediately open the bag, roll the top down a bit and make sure it cannot tip or spill.
Do not allow the bag to float sealed with the rubber band still on. After opening the bag, immediately drop an airstone connected to a small pump in the bag; I have done this for years, it has an amazing calming effect on the fish. A struggling, heavily breathing fish will completely relax with addition of an airstone, in fact I have a small inexpensive pump dedicated for this purpose... the airstone is connected to a 10 inch piece of stiff tubing which keeps the stone at the bottom of the bag, then linked to the pump with about 24 inches of flexible tubing. After about 10 minutes you can add a small cup of water from the QT into the bag, no more than 10 percent of the bag volume at first, repeating every 10 minutes or so for an hour. As time goes by you can add larger amounts. Eventually the water in the bag is double or more the original volume. Carefully pull the bag out and pinch the top while you drain almost all the water out of the bag. (Caution; always drain the bag over a bucket or suitable container, NOT a sink or toilet) This draining will stress the fish a little, but it reduces the risk of free floating pathogens. Finally, dip the bag to add a little water from the new tank and gently slide the fish into the its new domain.
Larger specimens like Lionfish may require a more sturdy mixing container, a small insulated cooler or styro box will work if the bag is too big to float.