Is it possible to dip a glass bottle or wooden box in silver?

Rather than dipping your box or bottle in molten silver (which would be hot enough to make the wood spontaneously combust, I'd wager) probably isn't your best bet for getting a coating of silver.

Electroplating is. I've provided a link below of a do-it-yourself silver plating kit. Because your bottle or box isn't metal, you'll want to apply a special metal paint, so that you can get the silver coating to stick.

Note: this isn't cheap.

glass bottle, YES. wooden box i'm not sure... but as the one in front of me says, very very very expensive, yes... it will cost, because its custom made for your requirements.

very very very expensive (unless melting jewelry you already have) and you need it to be the PERFECT temperature but yes