Here is a modular strong C clip to hold canisters. Easy to print.
Printed on my DIY 3D printer
PLA (205°C/60°C)
45mm/s
0.3 Layer
0.8 Nozzle
2 shells
25% infill
3 Bottom and top layers
Printer:
DIY 3D Printer
Rafts:
No
No
Resolution:
0.3 Layer 0.8 Nozzle
25%
Notes:
0.3 Layer
0.8 Nozzle
2 shells
25% infill
3 Bottom and top layers
None
Designed with Sketchup and models checked with SolidInspector.