Review on ThermoServ Foam Insulated Coffee Black: Stay Warm and Enjoy Your Coffee Longer by David Bott

Love these - great replacement for the green ones which are no longer sold and the lid hasn't leaked in 9 months (hooray!). However, I have a comment. The edges of the handle are quite sharp, and there are grooves on the inside that make the edges sharper. So when I wrap my fingers around the handle to lift it, I have pain on the underside of my fingers, in the fat area below the middle joint. My index finger in particular is on the verge of blistering, but a callus may form instead. There should be no blisters or calluses on the cup. Note to manufacturer: Remove the square edges of the handle and round them off a bit more. You might even consider just making it a hollow tube, removing the extra grooves and sharp edges of the entire handle.