Imbibing wine from such a vessel is the same as if it were a regular wine-holding glass. Raise the glass. Say "Cheers!". CLINK! Then drink.
Of course, you have to first acquire the right kind of glass, or this will be all for naught.
Many great unbreakable wine glasses can be acquired at Amazon. With that said, you might do your friends and neighbors a favor and buy local. Where I live in Burlington, Vermont, there is at least one locally-owned store where I can buy shatterproof wine glasses.
Perhaps, a similar sole proprietor exists in your town. If you find one and spend your money there, your cash will stay in your community and help your local economy.
No matter whether you buy sturdy, new break-proof wine glasses online, in your town, or if you have decided these things are not for you, I bid you a healthy "Cheers!".
Thank you for stopping and reading this today.