1. High-Density Polyethylene (HDPE):

Common uses: Food and beverage containers, cutting boards, storage containers, cereal box liners, grocery bags.
Pros: Affordable, lightweight, good chemical resistance, and rigid enough for various uses.
Cons: Limited heat resistance, can become brittle at low temperatures, and susceptible to scratching.

2. Low-Density Polyethylene (LDPE):

Common uses: Food wraps, cling film, sandwich bags, freezer bags.
Pros: Flexible, low cost, and excellent moisture barrier.
Cons: Lower strength than HDPE, not suitable for high temperatures, and prone to tearing.

3. Polypropylene (PP):

Common uses: Food containers, bottle caps, straws, reusable food storage containers, microwave-safe containers.
Pros: Good strength, lightweight, microwave-safe, and chemical resistant.
Cons: Not as transparent as some other materials, can become brittle at low temperatures, and may absorb odors.

4. Polyethylene Terephthalate (PET):

Common uses: Water bottles, soda bottles, salad containers, food trays.
Pros: Excellent clarity, lightweight, recyclable, and good barrier properties.
Cons: Limited heat resistance, can deform at high temperatures, and not as strong as some other materials.

5. Polycarbonate (PC):

Common uses: Food storage containers, water bottles, baby bottles, blender cups.
Pros: High impact resistance, good heat resistance, and dishwasher-safe.
Cons: More expensive than some other materials, concerns about potential BPA leaching, and susceptible to scratching.

6. Nylon:

Common uses: Cutting boards, kitchen utensils, food processing components.
Pros: Strong, durable, abrasion-resistant, and can be dishwasher-safe.
Cons: Can absorb moisture and odors, potentially harbors bacteria, and can be expensive.

7. Silicone and Rubbers:

Common uses: Baking molds, spatulas, oven mitts, food storage lids.
Pros: Heat-resistant, flexible, non-stick, and dishwasher-safe.
Cons: Can retain odors, susceptible to staining, and can be more expensive than some plastics.

Remember, this is not an exhaustive list, and the specific materials used in your kitchen will depend on personal preferences and brand choices. Choosing the right plastic depends on the intended use, considering factors like heat resistance, durability, safety, and potential risks for food contact.