Million Dollar Pips says:

Stackable boxes really are a must when moving house, irrespective of self-drive van hire or removal company lorry. Sturdy green, recyclable boxes that may be reused repeatedly are the most useful option for frequent house moves as well as for long term storage – regardless of where the home move happens. There is nothing more frustrating than having to reload many times, since the awkward manner in which situations are packed prevent a completely loaded van making one tour and something tour only.