Make a Mad Eye Moody Mad Eye

Step 2 Cut a big hole in the lid

The lid is made of low density polyethylene (LDPE) so should be easy to cut and get a nice clean edge using a sharp craft knife. (be careful it's small and you could easily slip and cut your fingers). Most caps have alittle rim in the inside to help with the sealing, it's probably easiest if you cut up to this rim.

To get a nice even cut don't aim to cut the hole out all in one go, cut nearly to the edge and then carve away at the hole carefully making the hole nice and even.

You could even finish off the hole with fine sandpaper (or a file) to make it nice and smooth, but if you do this, don't smooth the top of the lid with the sandpaper and you will only scratch it up. (If you are careful with the knife you will not need to do this)