Decor bigger neck bottles to hold bath salts, candy, etc.
Eggshells on bottle to make it look like crackled. (Old Monk Bottle Painting)
Its in Russian but I 'THINK' its a design + puffy paint + etching details on the puffs + paint + glaze. Will have to try this technique.
Paint bottles with glass paint, then decopage. Amazingly beautiful and you could do it to about any jar that didn't have printing molded in. Im going to round up bottles now!