We only use high quality 304 food grade stainless steel and very high quality rhinestones and materials to make our products. The sparkling rhinestones on the refillable water bottle are beautifully inlaid and won't come off easily. The entire bottle is glossy, and the grooved bottom design provides stability. The lid is removable, and it also has an opening so you can easily drink straight from it, or plug in a straw. No need to unscrew the cap frequently when drinking, very comfortable and easy to carry! The shiny diamond water bottle is stylish and practical, with double-layer vacuum insulation technology. It is a good choice for preserving iced drinks in summer or hot drinks in winter. The cup comes with a stainless steel straw.