Whisky flasks are another very popular gift for whisky lovers. They are great for carrying whisky with you when you're out and about and they come in a huge variety of decorative designs, materials and standards.
The round, slim flasks are known as "sporran flasks", for the simple reason that they are specifically shaped to fit into a Scotsman's sporran. However, they will fit just as easily into a jacket pocket, a handbag or a laptop bag. If that's how your whisky lover will use the flask, then there's no need for it to be round of course - but they do look rather decorative.
Another very popular choice is the "hip flask". These have a slight curvature to the flask so that it will conform to the shape of the user's body if they put it in their hip pocket.
The most common materials are pewter, silver and stainless steel. Decorative embellishments abound, and you can have your gift recipient's initials, or even a personal message, engraved on the flask should you wish.