This model is a bottom end cap with center hole for a Thermoflask 40 oz/1.2 L. Model is for supporting for tailstock end during laser engraving. 

The center support for the center hole could be removed. Clean up the model, and use as a replacement bottom cap for the bottle. The world is your oyster.

Inner diameter is 91mm

Outer diameter is 94.5

Successful print made with:

PLA

200c .4mm nozzle (PLA)

160c .4mm nozzle (Snapmaker support filament)

60c bed

.16mm layer height

25% Cubic subdivision infill

Printed on a Snapmaker Artisan 3in1 printer using dual filament nozzle