Tough call without any marks and no label. This one, with a somewhat different shape is said by the seller to be French and from the 1980s:
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The seller doesn't know what it held, but my bet would be an armagnac or cognac. Note that this is a 10 inch bottle. You didn't give a size for yours but, if that's a sheet of kitchen roll it's sitting on, it looks substantially smaller. It could have been a 'souvenir' bottle containing a double measure of spirit or liqueur but I have also seen small novelty bottles in shapes like that containing 'cocktail flavourings' such as Angostura bitters.