👋🏼 Hey, new users, and welcome to Poshmark! Want to save $10 on this purchase? It's easy—just use my ambassador code, MBSELLSONPOSH when creating a new account!) Brand new in box, never used! About: •CUP HOLDER EXPANDER FOR OVERSIZE BOTTLES/MUGS: The 4, rubber tabs keep most oversize (3.4”-3.8”) bottles or mugs securely in place. Perfect for certain versions of Hydro Flask, YETI, RTIC, Nalgene, CamelBak, Klean Kanteen and more! •3-RING EXPANDABLE BASE: Adjustable base has an expandable diameter from 2.5"-3.75". This allows the adapter to stay firmly in place, regardless of how rough the terrain gets. •SLOT FOR COFFEE MUGS: The 1 inch slot is integrated into the design so coffee mugs will fit with ease. This is perfect for the popular YETI 24oz Rambler. •EASY INSTALLATION: Just hold the base and twist the top, the base will then retract or expand. Comes with instruction card. •UNIVERSAL: Fits in almost anything with a cup holder; such as vehicles, boats, RV’s, UTV’s, etc.