Do not pull up the rubber mat beneath the top cap.
You will not be able to replace it properly and you will end up with e-liquid all over the shop.

You just have to poke the liquid bottle through either of the 2 holes either side of the chimney hole.
Do not pour e-liquid down the centre hole of course, as you all know already.

I still say it's the best device I have ever used despite the filling method being a little confusing for the elderly ;-)

I wish I had discovered the Voopoo PnP range earlier as the platform is a game-changer for me with regard to performance and flavour. With the availability of the 4.5ml version of the pod I can finally give up on the old tank+mod combo that currently isn't giving me what I need.

Anyway, you need one of these to replace the standard TPD pod that comes with the Drag H40 kit.You may though be rather confused with the lack of the bung on the side of the pod for refilling. The manual suggests there is a bung under the removable top cap. It's not a bung, it's a rubber mat. Carefully pull that upwards (attached at one end I think) and you will see the fill-holes.