Breast cancer reserach has shown that all too often, women just forget to check their breasts regularly for changes. To help remind people, agency CP&B London has come up with a pro bono creative idea for U.K. breast cancer charity CoppaFeel: a boob-shaped soap that lasts for 30 days, the idea being that when it runs out you remember to check again.

BoobSoap is currently available in three different designs via the project website, at a cost of eight pounds 99 pence ($11.77) after an initial short run was produced at-cost by London-based artisan soap-maker Soapsmith. However, CP&B is in talks to have it stocked at boutique retailers, and hopes eventually to sell it in major chains and department stores.

CoppaFeel! will also promote the BoobSoap idea as part of its annual #ShowerHijack campaign, where the charity 'hijacks' communal bathrooms at universities, gym chains and yoga studios across the U.K. with a range of awareness raising materials.