We use vacuum-sealed packaging to keep our food fresh, without using any preservatives or chemicals. Pack sizes range from 1-3 inches in height and 4 - 7 inches in width. Which is about the size of a smartphone or two stacked on top of each other. When your Ollie box arrives, we recommend storing your food in the freezer first. In the freezer, packs will stay fresh for up to 6 months. Before feeding, you can move a pack or two to the fridge to thaw over 24 hours. In the fridge, the food will be good to serve your dog for up to 4 days. Always remember to put the Ollie in the puptainer with the lid on it after you’ve opened it to preserve the freshness.