Flour is ok, but fresh meat and eggs are not. The latter needs high temperature, and vacuum is just the air pumped in, which is useful for preserving relatively good things, but it is definitely not good for foods that need high temperature and time. Fresh meat can be cut into small pieces, wrapped in fresh-keeping bags and put into the freezer. Don't buy too much, so you can finish it as soon as possible. Eggs are especially important Don't touch the water, that is, don't clean them. Put them in the refrigerator drawer and eat them as soon as possible. Don't buy too much at a time if it's not particularly useful. These are not easy to keep. Buy as much as you want, and the average quantity can be bought for about a week! You know, it's best to eat fresh!