Cup of Wine Used with Special Blessings - Kos Shel Berachah כוס של ברכה

Cup with Blessing after Meals

Kiddush

Havdalah

Drinking in Pairs of Cups

For the "Shehechiyanu" Blessing on Special Occasions

Need a minimum measure: Pesachim 105b

The measure of wine is one which will produce a Reviit Amount on dilution: Shabbat 76b-77a; Eruvin 29b

Specifically of wine: Pesachim 107a

Once someone drinks from the cup, it is not usable: Pesachim 105b, 106a

Concern for a pitcher from which one has already drunk: Pesachim 106a

Concern for a barrel from which one has already drunk: Pesachim 106a