A white wine emoji is needed as an option on the Apple iPhone.  Why would you have red wine and not white wine? There is a champagne bottle and champagne flutes.  There is a beer stein and then two beer mugs together.  There are four different types of bread. You have four open spaces in the FOOD & DRINK category and enough white space for the white wine emoji.  A possible suggestion would be to hold down the wine glass like you can with other emojis, and have different colors of wine appear in the glass.  Cheers to all lovers of white wine!