The SKE Crystal 4 in 1 is a clever, high-quality vape kit from SKE that contains up to 4 x flavoured 2ml pods at any one time. It has an internal 950mAh battery, rechargeable via the supplied USB-C cable. Overall it is slightly bulkier than a standard pen-style vape but it is still compact, durable and attractive in design.The ability to store 4 x 2ml pods within a cylindrical clip that is inserted into the device gives an increased (yet UK-legal) e-liquid capacity of 8ml, which allows for a far longer lifespan, up to 2400 puffs before the e-liquid runs out.