<b>Gadjit CUP KEEPER Cup Holder Adapter expands narrow vehicle cup holders to hold beverage containers with a BASE DIAMETER of 3.25" or LESS. It fits Coffee & Travel Mugs 28 oz, Convenience Store Cups 48 oz, 1-liter Bottle and many styles of Hydro Flasks 18 21 24 oz, Yeti Tumbler 20 & 30 oz,. IT DOES NOT FIT 32 & 33 Oz bottles </b> <br><br>EXPAND CAR BEVERAGE HOLDERS to 3.25" in DIAMETER - <br><br> Use in cars, trucks, RVs, golf carts, tractors. It is completely portable -- it goes where you go. <br><br>WILL IT FIT MY BEVERAGE? It fits Hydro Flask 18 oz, 21 oz, 24 oz, Yeti 20 oz Tumbler, 30 oz Tumbler, 12oz JR, 12 oz Bottle, 18 oz Bottle. --- Coffee Shop Cups like up to 28 oz, Gas Station Soda Fountain Cups up to 48 oz, and Water Bottles up to 1 liter (32 oz). <br><br>It WILL NOT fit large Yeti Tumblers over 30 oz, the Hydro Flasks 32 oz, and 40 oz. or any of the Nalgene Water Bottles. <br><br>WILL THIS FIT MY CUP HOLDER? To ensure a good fit – PLEASE MEASURE the diameter and depth of your existing cup holder. Cup Keeper will fit if your cup holder is 2.5-3" in diameter and is about 2" deep. If your cup holder is over 2.5” wide, you may want to purchase Cup Keeper 2.0 with it’s silicone beverage band. Using the beverage band will create a snugger and more stable fit. <br><br>IF your cup holder is larger than 3.25”, the Cup Keeper will not be able to expand it any larger than it is. So please measure before you buy! We offer a 30-day money-back guarantee so that you're not stuck with something that won't work. PROUDLY MADE IN THE USA.