This is a Shelving system that will fit the alternative tray designed by Bas van der Ploeg to keep filament samples created by @Zahg and @Seemonster

The filament samples were a perfect fit for my needs and the alternative tray was in the same lead, however, I needed to keep the trays together not warring about miss placing them or keep looking for them when needed so I came up with this simple shelve idea following these criteria

• Expandable adding more trays when needed (the Shelves are stackable, they will slide together make them one larger unit)
• Fast printing with minimal materials (originally, I designed this with hexagon opening in all five sides. I also tried it with full sold walls; however, with testing I found out that keeping the 2 sides with the hexagon’s and the other sides fully sold was the fastest approach with some material saved and it was the safest compromise between speed and weight)
• Keep the tray secured so they don’t fall out when the shelve is moved or pushed (I solved this by adding a small lip to the open side of the shelve, now I can flip the shelve upside down and things will stay in place -Unless flipped aggressively-)

Note: I printed the model at the same orientation provided without support

If you’re using the alternative tray version to keep the filament samples then this is a nice addition to keep things neat.