Amazon Basics Car Cup Holder Expander, 3.4-3.8 in Bottles
- Categories
- Car accessories
An adjustable cup holder expander for bottles 3.4 to 3.8 inches in diameter, with a base listed for 2.6 to 3.9 inch holders and a note on cars it does not suit.
★ Best Pick💵 Lowest price
Measure your cup holder first, since the listing names models it is not recommended for.
The Amazon Basics expander is an ABS plastic adapter for bottles 3.4 to 3.8 inches in diameter, with a base that expands to fit holders of 2.6 to 3.9 inches. The listing mentions soft rubber grips, a tool-free twist-and-lock setup and names Yeti, Hydro Flask and Nalgene sizes. On Amazon US it was $10.45 on November 3, 2026.
Pros
- Lowest price of the five
- Clear size ranges and compatible bottles listed
- Tool-free twist-and-lock setup, per the listing
Cons
- Listing names vehicles it does not suit
- Not for extra-wide or enclosed holders, per the listing
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