The supplement is in the form of water - soluble powder for easy feeding, and comes in individually sealed packets that keep out moisture. (petbusiness.com)
Fold the sides of the foil over the fish and tomato mixture, covering completely; seal the packets closed. (cookingchanneltv.com)
A term used by French cooks to describe food cooked in tightly sealed packets of parchment paper, there are taste benefits, health benefits, and presentation benefits for cooking this way. (foodandnutrition.org)