Used Cardboard Boxes
Once-used Boxes - Great for your wallet and the environment! The Producer Responsibility Obligations suggest that for buyers of used boxes (packaging), there is no obligation to recycle so in principle there is no levy to pay on tonnages of used packaging purchased.
Using second hand boxes is a great way to get the functionality you need, at a much lower cost. If appearance doesn't matter, you could choose a printed box. We have excellent quality plain boxes too. Once-used but well looked after.