He added that production at the company's King's Lynn site has not started up again and it will now be marketed as a "turnkey operation" only, while the Bristol site will "continue production in the short term to satisfy customer demands".
However, he could not comment on whether the company had received some parties interested in buying the business at this time.
Last week, more than half of the firm's employees were made redundant following the appointment of joint administrators Alistair Wardell and Daniel Smith, of Grant Thornton, on 25 August.
The 95 redundancies were largely focused on the company's King's Lynn business, although the Grant Thornton spokesman said there had been some redundancies at the Bristol site.
According to Unite, staff were sent home prior to the appointment of the administrators, with production only resuming at Bristol late last week.
The administrators said CPC Packaging UK had experienced "a difficult period" following a fire at its King's Lynn, Norfolk-based business, in December 2008, which affected operations "for some time". It also cited depressed profitably as a result of recent high raw material price rises.
However, the catalyst for the firm's ultimate demise was the withdrawal of funding by its bank, RBS.
A spokesman for RBS said the business had been experiencing "severe financial pressures" and had identified the need for additional cash to continue trading.
"However, the firm's parent company [Paris-based Groupe CPC] was not willing to provide further support and because we were unable to establish the future viability of the business, it would have been irresponsible for us to provide additional lending," he added.
According to accounts filed at Companies House for the year-end 2008, combined staff at the two sites in 2008 was 162.
Turnover at the King's Lynn operation was £12.3m, on which it made a pre-tax loss of £642,000, with Bristol generating £11.4m sales and a £188,000 loss.
