TANDEM INLET BOTTLE HOLDER A tandem inlet bottle holder is a device that helps you store multiple glasses inside a drawer. It has a base made of anti-slip material and a screw to adjust the depth. It is easy to mount and prevents the bottles from falling over due to any motion or jerk. It is usually made of stainless steel and comes in different sizes. You can find some examples of tandem inlet bottles holders from Zuma Corporation. Specification : Anti Slip Material Base for Long Grip, Screw to Adjustable 10mm Deep, Easy to Mount.