Am thoroughly amused at the possibility of wine lasting to night 3 (although maybe I'm not allowing for more than one).
I have a couple of these and they work as promised. They don't flavor the wine, they don't leak and they stow easily with the food.
Even though they don't flavor wine in a way I notice, they do seem to retain a bit of wine flavor if used as water storage afterwards. They also take forever to dry out, but that's common to all narrow-mouth containers.
The no-cost alternative is a drinking water bottle, collapsed enough to evacuate any air. PET doesn't seem to flavor wine, either. Use once and recycle at home.
Cheers,