$fn=64;

// Parameters
jar_diameter = 65;      // Inner diameter to fit the treat jar
holder_height = 50;     // Total height of the holder
wall_thickness = 3;     // Thickness of the outer walls
base_thickness = 3;     // Thickness of the bottom base
cutout_width = 40;      // Width of the front viewing/access cutout

outer_diameter = jar_diameter + (wall_thickness * 2);

difference() {
    // Main body
    cylinder(h=holder_height, d=outer_diameter);

    // Inner cavity for the jar
    translate([0, 0, base_thickness])
        cylinder(h=holder_height + 1, d=jar_diameter);

    // Front access cutout to easily grab the jar or see treats
    translate([-cutout_width/2, -outer_diameter/2 - 1, base_thickness + 15])
        cube([cutout_width, outer_diameter/2 + 2, holder_height]);
        
    // Center mounting hole (optional, for securing to a shelf/desk)
    translate([0, 0, -1])
        cylinder(h=base_thickness + 2, d=4.5);
        
    // Countersink for the mounting screw
    translate([0, 0, base_thickness - 2])
        cylinder(h=2.1, d1=4.5, d2=8.5);
}