Very good, sensitive stainless steel (Chromargan). By Material thickness extremely stable. The bowl is really great in hand and convinced simply by a great quality and workmanship. The included rubber ring ensures stability. Convinced me both as a bowl, as well as water. Price: Especially in stainless steel tableware I've made the experience that quality has its price. And good stainless steel tableware holds at least a lifetime. In my kitchen just Rösle and WMF have survived (some with 10 years Snack-use). Everything else has already passed away.