Amazon Basics Car Cup Holder Expander with Adjustable Base, Securely Holds Large Bottles 3.4 to 3.8 in Diameter, Compatible with Yeti, Hydro Flask, Easy Installation, Black

Customers find the cup holder fits well in various vehicles, including Jeep Wrangler and Tesla models, and works particularly well with 40 oz Hydroflask tumblers. They appreciate its versatility for larger drinks and consider it good value for money, with one noting it's better priced than other adjustable options. The installation process is easy, with the expanding feet making it simple to install and remove. However, the stability receives mixed feedback, with some saying it holds securely while others report it doesn't stay in place, and durability is a concern as multiple customers report it breaking easily.