Wet Pack/Grocery Bags Package Items such as Meat or Frozen Fish or other Food that may Condensate. Wet pack bags are made from white high density polyethylene to effectively package frozen or food that may condensate. Wet pack bags also isolate wet foods from other foods or packages. Available widths are 5", 6", 7", or 8". Lengths range from 11" to 18". Sold in package quantities of 500 or 1000.