UA Sideline 64 oz. Water Bottle

Style # 1261299
RM 89.40 RM 149.00
Height: Size:
    • Color: Red (600)
    • Size: One Size Fits All
    • OSFA
  • Availability: 

    In stock

Due to limited quantities, only 1,000 allowed per customer.
The product can't be added to the bag
Height: Size: Fit: One Size Fits All
UA Sideline 64 oz. Water Bottle

Product DNA

As any serious athlete knows, hydration ain't no joke. Ready to handle anything from two-a-days to tournaments, this thing holds an impressive 64 ounces. Dependable insulation keeps your drink nice and cold, while the easy-access, flip-top lid keeps your water breaks running smooth.
  • Fold-down carrying handle with integrated fence hooks
  • Double-wall foam insulation
  • Locking flip-top lid with one-hand push-button operation
  • BPA Free
  • Manufactured by Thermos®, exclusive licensee of Under Armour®
  • PRODUCT UPDATE: Based on athlete feedback, we improved the way this water bottle is built so it performs even better—tell us what you think by submitting a review
  • All Under Armour® Performance Eyewear lenses block 100% of UVA, UVB & UVC rays
  • Material wicks sweat & dries really fast
  • Style #: 1261299
  • Capacity: 64 oz.
  • Imported
  • Temple 123mm
  • Imported
  • Imported
  • Recommended Fit LG-XL
  • Fit: Medium-Large
  • Fit: Medium-Large
  • Imported

Review Summary

122 Reviews


Runs small Runs large


Min. Max.


Min. Max.

Lid leaks

Seems that the lid only tightens to a certain spot and is not tight enough to where it starts to leak when you start to drink out of it. It looks like this was done so that the mouth hole would be positioned in between the handle arms, which doesn’t allow the lid to be tightened enough for proper seal. I wish I had kept the receipt so I could have returned it. Or if there was a way to send back to Under Armour for a better replacement.

Mold issues

My whole family are athletes, and we love the product, but the only issue is the mold build up that it forms at the silicone part. No matter many times wash with bleach, mr. clean sponge and other products to sanitize, and clean it won’t come off. Do parts sell separately?

I love it!!!! Is there a straw that works??

Absolutely love this product! Wonder if there is a straw system for it, like would a camelback tube work???

Great except for the lid!

This water bottle started off amazing. Keeps water cold and secure and was just overall great!. Then mold started to build up under the lid on the silicon stopper. Washed it and it got semi clean. A week later and there was even more mold that can't be washed off, rendering this water bottle useless now! If the mold issue was fixed, this would be a 5 star watter bottle.

poor quality- fell apart

I purchased this water bottle two weeks ago for my daughter for camp. While she was standing in the line for camp the outer plastic layer of the bottle just slid off and fell to the ground. Very disappointing!

Water leaks out

First time I used this thermos in my golf cart, all the water leaked out. The spout was locked and closed and the cover was snuggly closed. Very disappointed.

Very Durable! Perfect for Football Team

Keeps the ice from melting. Keeps gulp slot covered so it stays sanitary during outdoor high school football practice. Very sturdy. Holds enough water for the grueling Kentucky football practice! A+ Will but again!

mold on silicon seal

The silicon seal became moldy. I tried to remove it with bleach, but I was unsuccessful. I would love to be able to purchase a replacement seal.

Breaks way too easily

After ONE DAY a tiny piece broke off the clear lip of the lid and now the bottle will only stay closed if you use the metal clip!

Use everyday

Great product and design. Needs available replacement seals. Please make the seals available. Have 4 unusable due to ruined seals.