The 6oz is great for 3/4 coffees; if you prefer a stronger coffee with less milk. Made from high-quality, non-porous borosilicate glass, the Joco 177ml (6oz) Reusable Coffee Cup is a ridiculously stylish and smart solution to enjoying your everyday brew without beating up your taste buds or Mother Nature. Every JOCO glass cup is microwave and dishwasher safe, free of chemical nasties and modelled after standard disposable cup sizes. This makes them your baristas and the natural environments new best friend. JOCO products are made from the cleanest and most premium materials available high-grade borosilicate glass and silicone. They are 100% plastic-free. JOCO cups are designed in Australia and proudly Artisan blown by the JOCO team in China, the silicone used with JOCO products is also produced at the JOCO factory in China. It is a premium material that is non-porous and completely free of all harmful chemicals, including BPF and BPS which are commonly found in BPA-free safe plastics. There is an obsession with the society of today where cheap convenience has created a plastic world with a disposable culture, research results have suggested that 1 million disposable cups are purchased every minute and 8 million+ tonnes of plastic enter the ocean every year.