So, this is kind of a weird beach bag, no?
That's not to say I don't like it. You're certainly not going to have trouble with sand at the bottom of your bag, are you? It's made of plastic too, making it highly practical against the elements.
At £3.99, it's a cheap addition to your holiday wardrobe. Or if you're feeling particularly crafty, you could cover it in your chosen fabric. Alternatively, you could pick up the kitsch blue version, and match them with your jelly shoes. Or not....