Ske Crystal 4 in 1 Pods | Prefilled Pods | 2ml | 20mg |2400Puffs Vape Juice | E cig | UK | New Arrivals |. The SKE Crystal 4in1 stands out with its unique revolving pod system. It includes 4 x 2ml TPD-compliant pods, each prefilled with 20mg Nic Salt e-liquid for a smooth throat hit and quick relief from nicotine cravings.