【Upgraded Cup Holder Expander for Car】 Simply turn the rotation ring of the cupholder expander to open the cup holder arms. insert your cup then gently push the cup holder arms inward for a perfect fit—they'll auto-lock in place. 【Fits Water Bottles & Tumblers from 12 to 64oz】 This adjustable car cup holder expander is compatible with Yeti, Hydro Flask, Nalgene, Takeya, Camelbak, Owala, and other popular brands in 2.6"- 4.8". The cup holder expander securely holds large water bottles, ramblers, tumblers, and travel cups. 【Expandable Base for Wide Vehicle Compatibility】 The adjustable base of this cup holder expander expands from 2.56" to 3.93", making this cup holder suitable for most cars, trucks, RVs, boats, and golf carts. No tools required. Simply twist to expand the base of the cupholder expander, pop in the adapter, and rotate to lock it in place. 【No-Spill Design with Anti-Slip Padding】 FLLIK cup holder expander built from thickened PC material with built-in buffers. This adjustable cup holder offers shockproof, scratch-resistant, and stable support—even on rough roads. 【Compatibility of Cup Holder Adapter】 This cup holder expander is not suitable for covered, deeply recessed or other shapes. Please check dimensions before purchase. Cup Holder Expander, Car Cup Holder Expander for Yeti, Hydro Flask, Nalgene, Takeya, Camelbak, Ramblers, Owala, Tumblers, Mugs, Large Water Bottles in 2.6"- 4.8", No Tools Required