Finding a stainless steel bottle with a drinking nozzle which doesn't require you to over-exert yourself in getting the water out is no mean feat. The issue is a simple one: you can squeeze a plastic bottle, but stainless steel ones require you to suck the water out, which is both inefficient and exhuasting after a long stint of cycling. Plastic bottles, however, degrade quickly and often develop mold if (like many of us) you leave it a liiiiiiittle too long on your bike. Have no fear, because Bivo is here! Bivo bottles have been designed from the ground-up by an ex-NASA engineer (I kid you not) to provide the optimum flow rate for cyclists. The stainless steel construction means your water always tastes like water, and not plastic. The food-grade silicone nozzle and drinking components are easy to disassemble and clean as well, so mold begone! The Bivo One uses a single-walled construction, and thus it is not insulated like its sibling the Bivo Trio. This means it's a lighter alternative for those who value weight savings over cold water! Features: Silicone anti-slip exterior on colored bottles Single-wall non-insulated Patent pending high-flow sport nozzle LFGB compliant food-grade silicone components 100% recyclable stainless steel BPA/BPS/BPF and phthalates free components Lid is interchangeable with Bivo Duo 620ml / 158 g dry weight