A cute science pun (chemistry and physics)! A cation is an ion with more protons than elections giving it an overall positive charge. A dication has a +2 positive charge and a trication a +3 positive charge (but they are both cations, they can just be given special names indicating how much extra positive charge they have). Here's some cats and balls of wool to illustrate it :).
The design is printed so that it wraps around the mug.
Available on a plain white mug or on a two-toned mug (a white mug with a coloured handle and inside in your choice of colour).
Dishwasher and microwave safe.
Volume: 12fl oz or 325ml (just over half a pint).
Width (measured across the top of the mug): 8cm.
Packaged in eco-friendly cardboard packaging.