Most plastic bottles are a mix of new and recycled plastic.
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A Synthetic Polymer
Plastic is waterproof, light in weight and it isn't delicate.
plastic bag
some are made from recycled paper fiber, others from plastic, while the most common are made of polystyrene foam.
Concrete is made from filler made of small pieces of rushed rock, gravel or sand held together with a water and Portland cement mixture. Different kinds of concrete use different ratios of the materials or even different kinds of material added to the mixture to give it strength, flexibility, durability or just to use recycled materals such as crushed glass bottles.