I wish I could go back in time and not pick these tumblers to build my brand around. The Libbey version I didn't have an issue with when I first started, but then they were never in stock and the Arc version brought in. These are so unreliable. 1/3 to 1/2 of each case of these have imperfections- bubbles in the glass, but much more frequently the bottoms are completely uneven. Not just a little either, as much as 1/2 inch difference from one side to the other. It makes them impossible to wick correctly. Luckily I notice this before I pour, so I'm just stockpiling them to send back by the case when I can to ask for a refund.
They look unprofessional and just awful.