The first images are of the first one that held together and almost looks right.
The second set are the result of my making about 10 and learning some tricks along the way:
- Measure the longest side and divide by 5 to get a sensible division instead of guessing
- Fold very very carefully, dont fold over the lines and make the folds very crisp
- When wrapping it around to form the cube, When first leaning this: use a little sticky-tape to hold it together until you have finished otherwise it just springs apart all the time!
- Popping up the first 90 degree corner
- Twisting the interlocking inner base
- Flattening the the outer base
masu 001 bottom turned out ok 
masu 001 first formed result 
masu 001 inside is a dogs breakfast 
masu 002 A4 in stiff tracing paper and A5s in standard photocopy paper 
masu 002 A4 in stiff tracing paper holds a tea light candle 
masu 002 A4 in stiff tracing paper ready for folding 
masu 003 A4 A5 and A6 
masu 003 A4 stiff paper with tea light candle 
masu 004 A1 to A6