Doggy Button

See / edit it here in Fusion 360: https://a360.co/2UGFDIZ

WORK IN PROGRESS
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This is a training toy for dogs.
You can put a treat (~1cm size) in the hole at the top that will be dispensed when the button in pushed.

Parts
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* Rubber bands to the length of your liking
* 3x M3-inserts (3*4*4 size)
* 3x M3x10 round head screws
* 3x 4cm PTFE tube, 4mm diameter (optional)
* 1x Bottom
* 1x Insert
* 1x Deckel
* 3x Plug (for the bottom)
* 3x Plug2 (for the top)