FIT MOST BOTTLES:
compatible with Yeti Ramblers 10-46oz
compatible with Hydro Flasks 6-46oz
compatible with Nalgenes 16-48oz
compatible with Hydro Cell 16oz-46oz
compatible with Nalgenes 16oz-48oz
compatible with Klean Kanteens 18oz-46oz
compatible with Contigo 21oz
compatible with Takeya 32oz-46oz
compatible with Healthy Human 32oz-46oz
Other cups & mugs up to 4.2" in diameter fit perfectly in this cup holder!