At first glance, shower steamers and bath bombs look almost identical — they're both colourful, fizzy tablets that smell amazing. But they're actually designed for very different purposes, and using one in place of the other can lead to disappointing (or irritating) results. Here's everything you need to know.
The Short Answer
Bath bombs go in the tub. Shower steamers go on the shower floor. That's the fundamental difference — but the reasons why matter.
How Bath Bombs Work
Bath bombs are designed to dissolve in a full bathtub of warm water. As they fizz, they release:
- Colour — turning your bath into a visually beautiful experience
- Moisturizing oils and butters — like coconut oil, shea butter, or cocoa butter, which soften and nourish your skin as you soak
- Fragrance — from essential oils or skin-safe fragrance blends that lightly scent the water
- Extras — some bath bombs contain dried botanicals, biodegradable glitter, or hidden surprises inside
Because your entire body is submerged in the water, bath bomb formulas are designed to be gentle on skin — the essential oil concentration is kept low enough to be safe for full skin contact.
How Shower Steamers Work
Shower steamers are placed on the floor of your shower — away from the direct stream of water — where they're activated by splashes and steam. As they dissolve, they release a concentrated burst of essential oil vapour that fills your shower with aromatherapy fragrance.
Unlike bath bombs, shower steamers are not designed to touch your skin directly. They contain much higher concentrations of essential oils — powerful enough to create a real aromatherapy effect through steam inhalation, but too concentrated for prolonged skin contact.
Key Differences at a Glance
| Bath Bomb | Shower Steamer | |
|---|---|---|
| Where to use | Bathtub | Shower floor |
| Primary benefit | Moisturizes & colours bath water | Aromatherapy via steam |
| Skin contact | Yes — designed for it | No — avoid direct contact |
| Essential oil strength | Lower (skin-safe dilution) | Higher (for inhalation) |
| Moisturizing? | Yes | No |
| Good for tub-free homes? | No | Yes |
Can You Use a Shower Steamer in the Bath?
We strongly advise against it. Because shower steamers contain much higher concentrations of essential oils, dissolving one in your bathwater — where your skin is fully submerged — can cause skin irritation or sensitivity. Stick to bath bombs for the tub.
Can You Use a Bath Bomb in the Shower?
Technically you can, but you won't get much benefit. Bath bombs are designed to dissolve slowly in a large volume of water. In the shower, they'll dissolve too quickly from the direct stream and wash away before releasing their full fragrance or moisturizing benefits.
Which One Is Right for You?
- Choose a bath bomb if you have a bathtub and want a luxurious, moisturizing soak with beautiful colour and fragrance.
- Choose a shower steamer if you're a shower person, want an aromatherapy boost to your daily routine, or need something to help with congestion, stress, or energy levels.
- Get both if you love variety — they complement each other perfectly for different moods and moments.
Shop Aquinas Soap Company
All of our bath bombs and shower steamers are handcrafted in small batches in New Lowell, Ontario, using natural ingredients and pure essential oils. No synthetic fragrances, no harsh additives — just genuinely good products for your skin and your senses.