Pretty easy, more like a giveaway than a competition but only for Twitter users. Robinsons Squash are giving away 5,000 free drinking glasses on Twitter. They're cute and smiley, and kids of all ages will love them. It's part of their current 'Enjoy More Water' campaign. Make sure you include an #EnjoyMoreWater hashtag in your tweet so that Robinsons can find your entry.