Stanley Adventure Flask Funnel
thingiverse
Wasn't really liking the Flask funnels I was finding so I decided to remix the "Funnel Cusomizer" by aaalberto7. Edited this in OpenSCAD to fit the opening of the 8oz Stanley Adventure Flask. Fits perfectly and it's vented (via external fins) so you can refill the entire flask in roughly 20-25 seconds without much worry for spilling or bubbling over. The opening for the flask is roughly 11.5mm diameter. This friction fits the opening just right. I printed in translucent PETG and the slight flex in the material gives it a premium feel which is nice. I suppose you could also print in PLA - while not "food safe" it will only be in contact with the contents for a few moments.
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