TPU Sniffer / Popper Bottle Cap

// ================================================================= // PARAMETRIC POPPER / SNIFFER BOTTLE CAP (TPU FLEXIBLE PRINT) // ================================================================= // Designed for flexible printing in TPU 95A / 85A. // Features internal safety filter shelf and tapered neck seal. $fn = 120; // High resolution for smooth surfaces // ----------------------------------------------------------------- // MEASUREMENTS & DIMENSIONS (Adjust in mm for your bottle) // ----------------------------------------------------------------- bottle_neck_od = 19.0; // Outer diameter of bottle neck threads (mm) outer_dia = 23.0; // Outer diameter of the cap body (mm) cap_height = 17.0; // Total height of the cap (mm) sniff_hole_dia = 6.5; // Breathing/inhalation hole size at top (mm) wall_thickness = 1.8; // Wall thickness for vapor tightness (mm) filter_shelf_dia = 12.0; // Internal shelf diameter to seat safety cotton (mm) // Calculated tolerance for TPU stretch fit inner_dia = bottle_neck_od - 0.4; // 0.4mm undersized for tight friction seal // ----------------------------------------------------------------- // CAP GEOMETRY MODULE // ----------------------------------------------------------------- module sniffer_cap() { difference() { // 1. Outer main cylinder (with rounded top edge) hull() { cylinder(d=outer_dia, h=cap_height - 2); translate([0, 0, cap_height - 2]) cylinder(d1=outer_dia, d2=outer_dia - 2, h=2); } // 2. Main inner cavity for bottle neck translate([0, 0, -0.5]) cylinder(d=inner_dia, h=cap_height - 4.5); // 3. Tapered sealing rim (creates a snap/compression seal over threads) translate([0, 0, -0.1]) cylinder(d1=inner_dia + 0.8, d2=inner_dia, h=2.5); // 4. Safety filter shelf (chamber to hold cotton pad) translate([0, 0, cap_height - 4.5]) cylinder(d=filter_shelf_dia, h=2.0); // 5. Inhalation funnel opening translate([0, 0, cap_height - 3.0]) cylinder(d1=filter_shelf_dia, d2=sniff_hole_dia, h=3.5); } } // Render the cap sniffer_cap();

Parameters

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