Warm Beverage Libbey 5213B Coffee Mug Cobalt Blue 13 oz, Set of 6 w/Bonus FDL Picks

The glass is very heavy and dark. One cannot see through it unless the room is very well-lit. I was expecting a lighter weight, more see-through effect. I'm considering returning them. Also, there is no manufacturer's name on the bottom of the mug. The box it came in did not say Libbey anywhere on it. The box said "Silver Vision Forks" on it, and that name was scratched out. So are they really a Libbey product, or a knock-off? They do seem to be microwave-proof.

No regrets...

I love these mugs, however, I still would like to know if they are microwave safe.

Exactly what I wanted. I had a souvenir mug that was a deep clear cobalt blue, and I wanted a whole set without the souvenir logo. I had previously ordered a set of cobalt blue wine glasses from Libbey that were just beautiful and have really held up well through the months, so I took a chance and ordered these. I read the reviews and Q&A and knew they were true blue glass. I also knew I could return them if they didn't appear to be what I wanted. They are great. I love drinking my coffee out of them every morning.

Substantial weight and size without feeling awkward and bulky. We love them and have had several compliments on these simple but lovely mugs. Overnight guests grab them before any others. There really is something about drinking coffee out of a glass mug, right? The cobalt blue is a nice change from the clear. We’ve run them through our dish washer several times (upper rack only and have had no problems. Easily recommend.

they cannot handle being washed in the dishwasher, they already look etched and worn

i love them, they hold the warmth of my coffee or tea.I put them in the microwave,and the dishwasher.I NEVER HAVE A PROBLEM.

Very nice quality, would definitely buy this again