Answer

By Anonymous

They are absolutely necessary when bivvying. Any wide-mouthed bottle does the job – but make sure you write ‘pee’ in BIG letters on the side to avoid confusion. Gals, you’ll also need a (bear with us now) Whiz All Terrain Urine Director (£7 – tel. (01865) 240572; www.whizaway.com). All you need to know is that it weighs 32g, packs down to 6cm, and works.