One certain way to make a drink cold is to add a giant ice cube to it. To add a certain element of danger to your drink you could also add a shark.
The Shark Shaped 3D Ice Mould should just about fit in your glass, but you'll certainly know you've got ice when you see a shark staring you in the face.
You'll need a bigger glass, but then again just get a bigger drink.
The Shark Ice Mould is 3D and made from silicone rubber. It's also made so that it will sit flat in the freezer and not tip over.
Buy one for £7.49 or two for £13.99