I have just come back from taking the mental dog to the park. I once again thanked the brilliance that is my extra long training lead so nutty dog can run and chase a ball without the sheer horror and embarrassment of me having to chase him round for an hour to catch him, afterwards. Every time I use it, I thank my lucky stars that I bought it. Cost about £5!!. So my question is; what is your favourite random purchase? Let's keep it cheap people, say under £20. 