Needs a lot more development before it is sold, a novelty at best and a very poor best. This product is very poorly designed. Whilst yes the wine from the bottle does enter the glass when the bottle is tipped unless you drink the entire contents of the glass wine pours back into the bottle. A simple valve arrangement should have been inserted in the stem to prevent this. As I said - a very poorly developed product that should never have made it to market in its current form.