Look for reinforced seals and leak-prevention features such as double zipper seals on bags and pouches, threaded or twist-lock caps, and screw-on lids on bottles that are described as leak-proof. These common closure types reduce spills during storage and transport.
Yes. Many storage bags and pouches have printed measurement markings for accurate portioning, and many are designed to freeze flat so they thaw faster and store more compactly in the freezer.