Molotow Liquid Chrome Marker creates ultra-glossy mirror-like effects. Can be applied to most smooth non-absorbent surfaces like glass or plastic. The chrome ink is highly-pigmented, permanent and UV resistant making it suitable for outdoor use. 

This pen is a little canister of liquid chrome adding a hint of glimmer and shine when writing rather than using regular liquid markers. 

The 2mm nib is a good medium size for a range of different work. Also available in 1mm and 4mm nib sizes.