30 oz. Tumbler Base
thingiverse
This stabilizing base saves me from spilling my 30 oz. tumbler due to my own clumsiness. I created its simple shape using Microsoft 3D Builder and printed it in PLA. Unfortunately, the slippery surface may cause it to slip off the cup easily. Applying a couple of hot glue smears inside will significantly enhance the grip. Printing with TPU for a tighter fit might also resolve this issue, but I haven't tested that yet. This design was tailored for an Ozark Trail 30 oz. tumbler and should work on other brands as well, possibly requiring slight adjustments to its scale.
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