$fn = 64;

// --- Parameters ---
cup_height = 45;       // Total height of the cup
top_diameter = 80;     // Outer diameter at the top
bottom_diameter = 60;  // Outer diameter at the bottom
wall_thickness = 2;    // Thickness of the walls
base_thickness = 3;    // Thickness of the bottom base
inside_fillet = 8;     // Radius of the inside curve (makes scooping tokens easier)
chamfer = 1.5;         // Bottom chamfer to prevent elephant's foot

// --- Calculated Variables ---
r2_out = top_diameter / 2;
r1_out = bottom_diameter / 2;
r2_in = r2_out - wall_thickness;
r1_in = r1_out - wall_thickness;

// --- Model ---
difference() {
    // Outer Body
    union() {
        // Anti-elephant foot chamfer
        cylinder(h = chamfer, r1 = r1_out - chamfer, r2 = r1_out);
        
        // Main tapered body
        translate([0, 0, chamfer])
            cylinder(h = cup_height - chamfer, r1 = r1_out, r2 = r2_out);
    }

    // Inner Void (Scoopable Bowl)
    // Using hull() on a torus and top cylinder creates a perfectly smooth, convex inner bowl
    hull() {
        // Top opening (extended slightly to ensure clean cut)
        translate([0, 0, cup_height])
            cylinder(h = 1, r = r2_in);

        // Bottom fillet ring
        translate([0, 0, base_thickness + inside_fillet])
            rotate_extrude()
                translate([r1_in - inside_fillet, 0, 0])
                    circle(r = inside_fillet);
    }
}