96 oz. plastic bottle, razor knife, drill with 5/32 bit, 5/32 pop rivet and rivet gun
Step 2: Cut bottle into these parts (unscrew cap)
cut bottle into these parts (unscrew cap)
Step 3: Drill
drill hole in center of cap and bottle bottom
Step 4: Attach
rivet the cap to the bottle bottom with the inside cup of each facing the same way. I usually insert the rivet through the bottle bottom then the cap. A small nut and bolt would work just as well. I did not have much luck with the glue I tried.
Step 5: Screw it
screw the bottle top back into the cap. The result is remarkably stable. The smaller you cut the diameter of the bottle top relative to the base the more stable it is.
Step 6: Use
A driver behind this was the need for a cup for pens where I could see the contents at a glance. And its very hard to spill.