Reduce P-Trap total height - any ideas?

Hi all, I am stuck with the problem of a waste pipe being too low which stops me from installing rail bins system. Making it 3cm shorter would be ok but 5cm would be ideal as drilling a hole in a shelf won't be necessary.
Unfortunately I already bought the bins as I was almost sure it should not be a problem but now I had no luck finding any solution, other maybe than US rubber J bend trap for caravans (60 degree max). Waste pipe connectors are joined using adhesive and P-Trap is a typical one with a dishwasher line.
How to move it up min. 3cm or shrink it? Any help much appreciated.