Antique French handblown glass Wasp Trap with stopper, slightly wonky and lots of natural air bubbles.
In excellent condition, the rim is always left in original form, ie rough edges. 
The stopper has lost its knob but this doesn't affect use
These were hung from trees with wire support or placed in the centre of a garden table.
Wasps and other insects are lured into the trap with the fragrance of rotting fruit juice lying at the bottom of the flask, they then can’t escape through the funnel at the top as it is sealed with the stopper or a cork
 
Dimensions: Height 20cm with stopper, without 19cm, max diameter 14.5cm