Small enough to fit into your hand luggage but powerful enough to power you through the water, techBar's Underwater Smart Scooter is a superyacht staple. Leave your flippers on the boat - they are a thing of the past - a built-in battery powers two electric motors which propel riders through the water offering up to 60 minutes of fun – and it only takes 90 minutes to charge. With a top speed of 2.7mph this underwater scooter is perfect for those looking for a leisurely snorkel. All you have to do is grab and go.
£799.95, selfridges.com