Vintage 2001 Starbucks Barista Mug Cobblestone Storefront Design 18 oz

I am listing those as used but they have no signs of usage, no stains, no chips, looks brand new. One of the mugs is slightly thicker and heavier than the other (1 lb 3 ounces versus 15 ounces). Their heights and diameters are exactly the same. One has just slightly thicker ceramic. Must be different manufacturers.