Restpresso 64 oz Black Thermal Coffee Carafe Server 8 3 4" x 6 1 4" x 11" 10 count box SOLD rare find! Indiana Glass mugs from the Tiara collection in Black Diamond Point pattern. these are solid black and heavy with a textured spike surface. made in the 1970s by Lot of 2 Pyrex 10 Oz. 300 ml Clear Custard Cups Ramekins #464, Straight Edge eBay Science Pop Quiz! , Both mugs hold exactly the same amount of hot coffee (300ml) and start at the same temperature. The only difference is their shape., Which one will cool down faster?, Drop PureSip Recycled Mug 27 oz Number 1 Boss Ceramic Coffee Mug 11oz