... LAYERS to preserve your food Type: 250ml B and S,200ml B and S Perfect container for MILK, JUICE,VEGETABLE PROTEIN DRINK ... . 3 PE layers: water proof, antiseptic, increase strength and thickness, protect printed layer2. 3 Bounding layers: reinforce the ... PE and paper, and aluminum foil3. Paper: printed layer and supporting layer, with certain strength, tenacity and stiffness4.Aluminum Foil: light and ...