The bottle drying rack used for tumblers is made of food grade silicone. It is soft and , free of , and will not scratch the stainless steel layer, making it safe to use The bottom of the drying rack is designed with raised horizontal lines, which allow air to circulate during use, making drying faster. The bottom waterlogging tray design can prevent water from the cup from flowing onto the countertop and keep it dry. ANTI SLIP DESIGN: The bottom of the drying rack is designed with multiple suction cups, allowing the drying rack to firmly adhere to the countertop. The raised the middle of the drying rack also allows the cup to be fixed within a certain range. Double fixation ensures the cup is safe and dry, without worrying about falling or slipping. SPACE SAVING: The bottom length of the drying rack is 5.8in, and the width is 4.1in. With just a little space, the cup body, lid, and 2 * straw can be dried simultaneously, making it very portable and practical. APPLICABLE CUPS: The bottle drying rack is specially designed for 30-40oz cups, and the position of the lid and straw is also customized. In order to that the straw can be easily inserted into the drying rack, we have specially designed it to be slightly larger than the straw, as long as it can be fixed. Slight color difference, please refer to the actual product Colour:Blue Material:Silica gel Package Contents: 1 x Bottle Drying Rack Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.