For the IKEA Samla-Boxes with 11 or 22 litres, there exists an insert tray, also named SAMLA, Article Number 501.029.73.
Unfortunately, the tray collapses and sinks down after some time or with too much weight put into.
This piece is a distance-holder, preventing the walls from being pushed inwards.
It does not need fixation and can be easily removed later on.
If you like a more permanent fix, you might want to have a look into https://www.thingiverse.com/thing:479007
Ikea_Samla_Abstandshalter.stl | 76.7KB |