This so-called Can Safe has a bottom part which can be unscrewed to let you hide your secrets inside the spray can itself

There must be no writer in Europe

If you’re missing any colours you can buy them separately here: Stylefile Marker Classic

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there's also a 3-pack

mtn liquid paint silver 200 ml NOS This so-called Can Safe hasMTN Liquid Paint Silver is a thin metallic paint which is perfect to use both indoors and outdoors. It works well for most refillable markers but is also great for using with an air brush or with a brush. The bottle contains 200 ml of paint. Also have a look at MTN Liquid Paint Gold 200 ml and MTN Liquid Paint copper 200 ml.