Kevin Sadler wrote about it:

“On Facebook, Tamás has been designing and producing some absolutely incredible challenges and has worked with Pelikan over the last year to bring them to reality for us all to enjoy, however, I have not seen him design a packing puzzle before. I was surprised and delighted to see the Umbrella amongst the latest arrivals. This packing puzzle has something special which is just what I would expect from Tamás – all the pieces have a unique box like design which allows them to be changed into 2 different shapes. The workmanship required to create this puzzle is astounding – the American Walnut L shaped pieces have a stem and a box round that stem which slides freely into each of the two positions. All the pieces need to be placed into the Ash box. ”

"There are quite a lot of solutions and it is a rather delightful soothing process to try and find them. There is always a single voxel gap inside and I have attempted to find solutions which have that gap in various different positions. This is a lovely idea and fun for all experience levels."