Answer: ​reverse channel
Step-by-step explanation:
The marketing channel here is the reverse channel. The reverse channel is also referred to as the backward marketing channel and it is the marketing channel whereby the goods that are meant to be reprocessed or recycled flow backward from the consumers before it gets to the producer.
With regards to the question, since the manufacturer haven't been able to resolve the issue with regards to packaging and the consumer will have to recycle all that packaging in some way, then it's a reverse channel.