The Science Behind the Suds: Why Our Foaming Soap Tablets Actually Work

Foaming hand soap tablets are small tablets you drop into a bottle of water to make foaming hand soap. A common question is whether they work as well as store-bought foaming soap. Here's how they work, what's in ours and what to expect.

How the Tablets Work

The tablet: Citric acid, sodium gluconate and cream of tartar hold the pressed tablet together and help it break apart and dissolve evenly in warm water.

The surfactants: The cleaning and foaming comes from two surfactants: Sodium Coco Sulfate (SCS) powder and a small amount of Cocamidopropyl Betaine. Together they make a rich foam and are designed to be mild on skin. Both are coconut-derived, so if you avoid coconut, shop our coconut-free collection instead.

The dispenser: You mix the tablet with water in a foaming pump bottle. The pump mixes in air and turns the liquid into foam. Use a dedicated foaming dispenser, since a standard lotion pump won't foam the same way.

Tablets vs. Traditional Foaming Soap

• Foam: The foam is dense and holds up well on your hands.
• Packaging: You keep and reuse one pump bottle, and refills are tablets instead of a new plastic bottle.
• Shipping: A tablet is lighter than a bottle of liquid soap, because the water is added at home.
• Cost: Because you add the water yourself, each refill costs less per ounce than most bottled foaming soap. A 10-pack is about $1.70 a bottle.

What to Expect

• First use: Drop the tablet into your bottle, add warm water and let it fully dissolve before pumping. That takes about 30 minutes, or less if you break the tablet in half first.
• Everyday use: Shake gently, not hard, to avoid extra suds in the bottle.
• Refills: When the bottle runs low, add another tablet and water.

Choosing a Scent

Our tablets come in Lavender, Eucalyptus & Mint, Bergamot & Citrus, Basil & Mint, Driftwood, Wild Child and Unscented, all scented with essential oils only. If you're sensitive to scent or washing a lot of little hands, Unscented is the simplest choice. Check the product page for the current lineup.

The Bottom Line

Foaming soap tablets give you the same pump-and-foam handwashing you're used to, with fewer plastic bottles and a short ingredient list. If you like a simple refill routine, they're an easy swap.

Watch our YouTube video about how we make these foaming soap tablets.

Want to try them? Shop Foaming Hand Soap Tablets, Pack of 10 or start with the Foaming Hand Soap Tablet Starter Set.