parcels

I need to send a box of goodies to my wife and daughter. I intend to use the type of box that you can buy from Shurguard or equivalant, sized at about 500 x 500 x 1000 high. Time is not a big issue so it doesn't have to go by plane and a max weight of 30 kilos. Does anyone know a cheap way...

Just got home from the most lovely Hawaii. My nieces and nephews have asked me to send them more chocolate digestives but the shipping rates on parcelforce and dhl are quite horrendous (about £80 for 10kg of weight). Anyone recommend a cheaper way? Speed of delivery is not important...