From female urinals for festivals to pissoirs on the streets of Paris, here are six of the freshest outdoor urinals designs for peeing in the fresh air.

P-tree by Aandeboom
When revellers at the Roskilde Festival in Denmark refused to stop peeing against the trees, Dutch design studio Aandeboom came up with an ingenious solution.
P-tree is a bright orange plastic urinal that can be mounted on trees, but protects them from the damaging effects of human urine. Pipes connected to the urinal can be hooked up to the main sewer system or funnelled into a tank.

Lapee by Gina Périer and Alexander Egebjerg
Launched at this year's Roskilde Festival, Lapee is a urinal that's bringing gender equality to the outdoor loo queue. Made from industrial-strength plastic, Lapee is a door-free place to pee that three women can use at once. Screened by the curving form of the unit, the urinals are stepped up so a squatting woman is at eye-level with any passersby, making it safer than a normal toilet but still private.

Uritrottoir by Faltazi
These urinals caused uproar when they were installed on the streets of Paris. A portmanteau of the French words for pavement and urinal, French design studio Faltazi gave the Uritrottoir a bright red upper section topped by a box planted with greenery.
Users pee into the opening, and the urine is absorbed by the woodchips, straw or sawdust that's placed inside. This mix is periodically removed and mulched down into compost, which is then returned to n...