The copper plating is peeling off on the mixer cups. What should I do ?

I always buy the stainless shakers because the way you use them inevitably wears that finish off the copper or gold. The copper looks good at first, but never holds up. In my experience this is true for all brands; however, you might reach out to the company and see if they’ll replace it.

If it's a travel bartender bag, where the heck are the glasses/cups?

It doesn’t come with other cups besides the Boston shaker 2. But there is a larger zip up poker you can put some glasses in. The kit is what you need to make drinks. The cups still have to be supplied.

Is it dishwasher safe?

Most pieces are metal, which I would assume are dishwasher safe, however, I have only handwashed which is my preference. There is one wooden piece to crush ice and muddle herbs and wooden objects should never go in a dishwasher.

Will i be able to get it cleared by TSA as a carry on item?

Good question. While we've never tried it before, most of the items in this set should have no problem getting TSA clearance. We would suggest taking out the corkscrew and possibly the wooden muddler to make sure you have nothing that can be interpreted as a weapon.