Customer reviews from hydroflask.com
Hydroflask - Sip 20 oz Insulated Bottle - Reef
Average customer rating
4.1
(683 Reviews)
Rating breakdown 683 reviews
5 Stars
443
4 Stars
52
3 Stars
63
2 Stars
51
1 Star
74
78%of customers recommend this product.
(
238 out of
306)
Customer Reviews for Hydroflask - Sip 20 oz Insulated Bottle - Reef
Customer Rating
1
Specifications by Hydro Flask say
on July 3, 2026
Posted by: Allison G.
[This review was collected as part of a promotion.] Specifications by Hydro Flask say it keeps hot drinks hot for 12 hours. It does not even come close, more like 2-3 hours. Very disappointed with this flask. My old flask by another brand definitely kept hot drinks hot for up to 12 hours. Even more surprising is that this is a brand-new flask that I received from Hydro Flask to replace my old 20 oz Hydro Flask.
Written by a customer while visiting hydroflask.com
Customer Rating
5
20 oz Coffee with
on June 11, 2026
Posted by: Susanne W.
[This review was collected as part of a promotion.] This was a gift to a friend. He is very happy with it and has commented favorably on its performance several times.
Written by a customer while visiting hydroflask.com
Customer Rating
5
Coffee Flex Sip
on June 7, 2026
Posted by: FERGIE G.
[This review was collected as part of a promotion.] Great for coffee and other beverages. Good size too!
Written by a customer while visiting hydroflask.com
Customer Rating
1
Stay Away from This Lid
on June 6, 2026
Posted by: Angela R.
I am extremely disappointed with this Hydro Flask lid design.
I've owned this bottle for only a couple of months and have used it approximately 10 times. Recently, I noticed black residue around the mouthpiece area when I went to take a drink. That immediately raised concerns, so I decided to inspect the lid more closely.
When I removed the silicone gasket, I was shocked to find a large amount of black buildup trapped underneath. The contamination was completely hidden during normal use and routine washing. The amount of buildup I found after such limited use is unacceptable for a product marketed as a premium water bottle.
What concerns me most is that I first discovered the issue because black residue had already made its way to the area where I place my mouth to drink. Who knows how long I’d been drinking without knowing what was accumulating inside the lid.
Even after extensive cleaning and scrubbing, the gasket remains stained and difficult to clean completely. A water bottle lid should not trap moisture and debris in hidden areas so easily, especially after only a handful of uses.
Hydro Flask needs to redesign this lid or provide much clearer cleaning instructions. Based on my experience, I cannot recommend this lid design.
I've owned this bottle for only a couple of months and have used it approximately 10 times. Recently, I noticed black residue around the mouthpiece area when I went to take a drink. That immediately raised concerns, so I decided to inspect the lid more closely.
When I removed the silicone gasket, I was shocked to find a large amount of black buildup trapped underneath. The contamination was completely hidden during normal use and routine washing. The amount of buildup I found after such limited use is unacceptable for a product marketed as a premium water bottle.
What concerns me most is that I first discovered the issue because black residue had already made its way to the area where I place my mouth to drink. Who knows how long I’d been drinking without knowing what was accumulating inside the lid.
Even after extensive cleaning and scrubbing, the gasket remains stained and difficult to clean completely. A water bottle lid should not trap moisture and debris in hidden areas so easily, especially after only a handful of uses.
Hydro Flask needs to redesign this lid or provide much clearer cleaning instructions. Based on my experience, I cannot recommend this lid design.
Written by a customer while visiting hydroflask.com
Customer Rating
5
20oz coffee “mug” with flex sip lid.
on May 23, 2026
Posted by: Pamela W.
[This review was collected as part of a promotion.] Great purchase for stuffing stockings for on the go teachers.
I’ll be purchasing more this fall.
I’ll be purchasing more this fall.
Written by a customer while visiting hydroflask.com
Customer Rating
5
Great product!!!
on May 18, 2026
Posted by: David K.
[This review was collected as part of a promotion.] Love your product, it's the best on the market. Holds my coffee burn hot for 8 to 10 hours.
The first one lasted me approximately 7 years, using it every single day before it finally lost it's vacuum seal rendering it useless at that point. This is my second one and I love the new colbolt blue color you added to your selection. Keep up the good work. Thumbs up , 5 stars.
The first one lasted me approximately 7 years, using it every single day before it finally lost it's vacuum seal rendering it useless at that point. This is my second one and I love the new colbolt blue color you added to your selection. Keep up the good work. Thumbs up , 5 stars.
Written by a customer while visiting hydroflask.com
Customer Rating
5
I am feeling the top/lid
on May 17, 2026
Posted by: Judy T.
[This review was collected as part of a promotion.] I am feeling the top/lid for this. I like the twist top. Feel more secure if it drops. the lid won't accidentally open. Love the slender bottle.
Written by a customer while visiting hydroflask.com
Customer Rating
5
The best!
on May 13, 2026
Posted by: Meghan M.
[This review was collected as part of a promotion.] Not sure how I have gone my adult life without this hydro! I didn’t know I NEEDED it until I got it!
Written by a customer while visiting hydroflask.com