Most new plastic polymers fall within the rules, although the definition of plastics in the legislation excludes cellulose-based polymers that have not been chemically modified. Plastic Packaging Tax will be levied on all forms of packaging where the heaviest component is plastic. Therefore, a plastic bottle with a paper sleeve would probably be within the tax whereas a cardboard sandwich wrapper with a clear film front would probably not.
However, the important point is that where packaging is mostly plastic by weight, the whole of the packaging is deemed to be plastic and the whole weight of the packaging will be taxed as plastic. Even goods imported in plastic packaging can be liable to the levy and it has to be paid by the business that clears the goods through customs upon entry to the UK.
We are also seeing multinational businesses registering for the tax based on either the product imported and/or its immediate packaging. This can be more complicated as it requires an in-depth consideration of the transport packaging exemption and determining who is liable for the delivery of the goods to the UK base. You will need to review and consider all available production data. This will reduce the risk of potential penalties for late registration.