Summary

Credit :0
Insert COINS

no coins for your coffee , I have a solution :

a cap + a hole+ a mug and a good slogan!
idéal to convert your favorite mug into moneybox

comment for all modifications you want !

ready to print standart size mug include

une tirelire pour les mugs
je suis ouvert pour toutes les modifications a apporter
en particulier sur la personalisation.

Instructions

Edit in Opencsad for personnalisation

//+-------------------------------------------------------------+
//| OPENSCAD PIGGY MUG BANK - Tasselire |
//| 2014 gaziel@gmail.com |
//+-------------------------------------------------------------+

//standart mug cotation from http://blog.ampli.fi/the-standard-coffee-mug-dimensions/:
//Outer diameter (a): 82mm
//Outer diameter + handle length (b): 120mm
//Height (c): 95mm
//Handle height (d): 73mm
//Wall thickness (e): 6mm (tapers down at the top of the mug)

//Easy use with a caliper :
external_D=82; // external diameter
internal_D=external_D-8; //Standart internal diameter
Ep=3; //thickness you want (not the thickness of the Mug !!)
Height=40; //height of the cap

$fs=0.2;
$fa=0.2;
translate([0,0,Height]) rotate([0,180,])cap();
module cap(){
difference(){
union(){
//external
difference(){
cylinder(r1=(external_D/2)+1,r=(external_D/2)+Ep,h=Height-Ep);
translate([0,0,-1])cylinder(r=external_D/2,h=Height+2);
}
//internal
difference(){
cylinder(r=(internal_D/2),h=Height);
translate([0,0,-1])cylinder(r=internal_D/2-Ep,h=Height+2);
}
//top
translate([0,0,Height-Ep])cylinder(r1=(external_D/2)+Ep,r2=(internal_D/2)+Ep/2,h=Ep);
}

    //coin hole      cube([30,4,5*Height], center=true);       //handle hole      union(){          translate([-10,0,-1])cube([20,2*external_D,Height-Ep-19]);          translate([0,(external_D+internal_D)/2,Height-Ep-20])rotate([90,0,0])cylinder(r=10, h=external_D+4*Ep);      }  }

}

Parametric Piggy Mug Bank / Moneymug