The inventors of a portable menstrual cup cleaning case have won a national engineering competition.
Bristol graduates Kira Goode and Monica Wai, both 24, won a contest that was held by the Royal Academy of Engineering.
The prize is a mentorship from Dragons' Den investor Deborah Meaden and an engineering entrepreneur.
The competition invited the public to submit ideas that make life more sustainable.
Ms Goode and Ms Wai, from Oxford, invented the case, which makes the menstrual cup sterilisation process quicker and more discreet.
The winner was announced on Saturday morning on Meaden's social media channels on Instagram, Twitter and Threads.
She congratulated the winners, adding that their invention was "smart, practical and really innovative".
Meaden added: "Looking forward to speaking about your winning idea!"
Dr Hayaatun Sillem, chief executive of the Royal Academy of Engineering, said: "It's been brilliant to see such creative and original ideas for sustainable inventions and to have discovered our three every-day engineer finalists.
"There has never been a more urgent need for engineering expertise to provide practical solutions and help to build a sustainable future."