Custom Bath Bomb Boxes

A standard bath bomb is 55-70mm across and roughly spherical, which is the worst possible shape for staying put. Cut the box to 75mm because it is a convenient number, and you have given a sphere 10mm of travel in every direction.

We cut the dieline to your actual diameter, allowing only the clearance needed to get the bomb in. For hand-pressed bombs, send the largest from a recent batch - like handmade soap, these vary more than their nominal size suggests, and a box built to the average will not close on the big ones.

Shaped bombs - hearts, cupcakes, moulded figures - need the box built around the widest point of the shape rather than a notional diameter, and usually want a tray with a cut recess rather than a plain box.

A multipack without partitions is a box of bombs knocking against each other. A fence partition or a punched tray gives each bomb its own cell, and it is the difference between a set that arrives intact and one that arrives as coloured dust.

The common formats are a four-pack in a two-by-two tray, a six-pack in a two-by-three, and a long single-row box of three, which suits a gift or bundled add-on. For sets, a two-piece box or a tray-and-sleeve with a die-cut window is the standard build: the colours are most of the appeal, and a window sells them without the customer having to open anything.

Bath bombs react with moisture - that is what they are designed to do. An unlaminated box gives almost no barrier, and a bomb stored in a humid warehouse or a steamy bathroom will slowly lose its fizz and can develop a crusted surface.

Matte or gloss lamination adds a genuine moisture barrier and is the usual answer for products with a long shelf life or retail distribution. A shrink wrap over the box is the fuller solution where the product sits in stock for months. This is one of the few personal-care categories where we do not recommend an uncoated kraft box by default - it looks right for the positioning and it works against the product. Where a brand wants the natural look and the barrier, we print on coated stock with a kraft-effect finish. Coating options are compared on our materials and printing page.

Heavily pigmented bombs can mark the inside of a box, particularly if they are packed slightly damp or stored warm. A coated interior resists it; an uncoated one absorbs it. If your bombs use strong colourants, specify a coated inside surface even where the outside is uncoated - the customer never sees the interior until they open it, which is exactly when a stained panel undermines the product.

Where the interior is printed rather than plain, keep the artwork away from the base panel where the bomb sits, or accept that it may pick up colour over time.

Bath bombs are an impulse purchase, and a large share of single-unit sales happen from a counter unit rather than a shelf. That changes what the individual box has to do: it is seen from above in a bin or a tray, often alongside five other scents, and the top panel is doing the work the front panel does everywhere else.

Two things follow. Put the scent name where it reads from above, not only on the front. And design the single box and the display together - a printed counter unit with a header holding a dozen boxes sells the range as a block, where loose boxes in a basket sell as commodity. We build matching bath bomb display boxes on the same artwork.

A window is close to essential in a gift set and optional on a single. Two structural notes. Keep the cut-out away from corners and folds - a large aperture near a crease removes the strength exactly where the box needs it, and a box holding six bombs is carrying real weight. And back the window with PET film rather than leaving it open, because an open window on a moisture-sensitive product defeats the barrier you added the lamination for.

Give us the diameter of the largest bomb in a recent batch and the pack count. If the box is going to sit in stock for months, say so - that is the case where lamination stops being cosmetic and starts being a moisture barrier. Related: soap boxes, bath bomb display boxes, and the cosmetic packaging range.