Drop-in Drink Holder Adaptor Tumbler Converter Ring

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Are you sick of your drink not fitting tightly in your cup holder and rattling around when you are under way? Our drop-in drink holder converter ring will secure your larger tumbler eliminating all concerns of tips and spills. Designed to fit most 3.5” cup holders, it is easily installed and removed with little effort.

Key Features:

  • Converts cup holder to more securely hold tumbler cup
  • Fits 3.5" cup holders - cup holders with inner diameter of 3.59"
  • Inside Width: 3.25" Outside Width: 4.125" Height: 0.75"
  • Composed of durable King Starboard
Stainless cup holder sold separately.
Drop-in Drink Holder Tumbler Converter Ring

Frequently Bought Together

  1. Drop-in  Drink Holder Adaptor Tumbler Converter Ring
  2. +
  3. 3.5" Stainless Steel Cup Holder
Total price: $0.00

3.6 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Works well
Works great but a bit pricey
August 19, 2019
6 months ago
Works perfectly
Works perfectly on my 36 invincible consul
Works perfectly
Works perfectly
June 10, 2019
8 months ago
Not a fan. Dimensions not accurately described.
April 15, 2019
10 months ago
Expensive plastic ring. Sent them back.
March 26, 2019
10 months ago
drink holder ring
it's made really well and holds my Tervis Tumbler perfectly!!

January 10, 2019
1 year ago
I cut a 3 3/4” hole in my gunwale and used some marine adhesive to secure the cup insert. It works great with my yeti tumbler
September 25, 2018
1 year ago
Love My Tumbler Rings!!
Love these cup holder rings!! They are made from high quality material. They keep my Yeti tumbler in place while at high speeds!!! I recommend these for anyone with a yeti style tumbler!
August 21, 2018
1 year ago
It only works with Yeti, the other similar cups do not fit.
June 6, 2018
1 year ago
work great
no more drinks sloshing around in the cup holders
May 21, 2018
1 year ago
Great idea, but too tight for 3.5in cup holder.
Great idea, and they look high quality. Expensive but ordered 2 to save myself the hassle of making them. Problem is they do not fit my boat’s 3.5in cup holders. I will need to shave off 1/16in to get them to fit without breaking them, defeating the purpose of the purchase.
April 30, 2018
Questions / Answers
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Browse 3 questions Browse 3 questions and 3 answers
Is this the only size? Do you make them to hold smaller items like bottles?
Timothy M on May 21, 2019
BEST ANSWER: Hi Tim, currently this is the only size that we offer. If you would like something more custom, reach out to us at 766-633-7961. Thank you!
Are they only available in white? Or are they available I other starboard colors?
A shopper on Apr 22, 2018
BEST ANSWER: Great question! Currently, they are available for order online in White. However, if you would like a quote on making them out of another color, please reach out to us.
Cup measurement?
A shopper on Jan 4, 2018
BEST ANSWER: Hello, this insert will hold cups up to 3.25" in diameter. It was really designed to securely hold double walled tumblers securely in a a standard 3.5" cup holder. I will include the full list of measurements below for you to review.

Fits 3.5" cup holders
Inside Width: 3.25" Outside Width: 4.125" Height: 0.75"
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