The sorting bomb!  A fully white bomb which hidden inside has a mini disc of red, yellow, green or blue, you have to catch your disc and colour before it disolves in the water - find out what kind of wizard you are...

They each weigh 140g  

Sorting Bath Bomb
Ingredients: Sodium Bicarbonate, Citric Acid, Parfum, CI42090, CI14700 CI19140
Allergens: Benzyl, Cinnamic, Coumarin
Ramsbottom Soap Co. Unit 4 Bolholt Industrial Estate, BL81PL
Not to be swallowed/avoid contact with eyes,
use within 12 months of opening