Sub-ohm tanks typically have larger E-LIQUID capacities, reducing the frequency of refills. They also feature advanced coil designs, such as mesh coils, which provide a larger surface area for even heating and improved flavour. The top-fill design is another common attribute, making refilling quick and mess-free. Safety features are integral to sub-ohm tanks, including mechanisms to prevent leaking and overheating. These tanks are compatible with a range of devices, from regulated mods to more advanced setups, providing flexibility and adaptability for different vaping styles.