1. Spillproof design: Prevents liquid spills with stable support for cups with 810 cm diameter. Reduces vibrations with triple antislip protection, flexible handle positioning for multifunctional use in various bag shapes and sizes. 2. Innovative attachment: Open mounting technique with quickaccess design allows effortless attachment and removal of the cup holder on bags. Strap handling optimizes everyday usability through intuitive operation while saving space and naturally optimizing grip. 3. Universal compatibility: Holds cups up to 1.2 liters (40 oz) and fits all common drinkware compatible with various brands. Ideal for cars, bicycles, strollers, and outdoor activities in any weather. 4. Easy installation: 3step system with twistandlock mechanism tool by sliding through the opening, twisting, and locking in place. Perfect holder for drink cups on bags installed in under 1 minute.