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Water bottle accessories worth buying
Start with a straw brush set and a spare lid, the two cheapest fixes for mold. Add a boot if the bottle clanks, and a cup holder expander if you drive.
See Owala FreeSip 24 oz on AmazonAmazon page See the bottles
Rechecked 10/28/2026 by Jonah Beckwith
Questions this page answers
Will the lid get moldy, and can I clean it?
The fix is a thin brush plus a second lid, so one dries while the other works. Together they cost under $18.
How this plays out across all 10Cheap fix: Bottle and straw brush set
Will it fit my car cup holder?
An expander holds bases from 2.7 to 4.2 in inside a holder of 2.6 to 4 in, per its listing. That covers every bottle on our list.
How this plays out across all 10Cheap fix: Car cup holder expander
Will it dent if I drop it?
A silicone boot takes the hit at the base, where most drops land, and quiets the bottle on a desk. Match it to your bottle: the Owala boot fits the 24 oz FreeSip only.
How this plays out across all 10Cheap fix: Silicone bottle boot
The picks for this job
Owala FreeSip 24 oz
Editor tested by CleverHiker (32 oz)
Owala sells a silicone boot sized for the 24 oz FreeSip.
Today's Amazon priceAmazon page
Best overall: straw and chug in one lid. Full review
Hydro Flask Wide Mouth 32 oz
Editor tested by CleverHiker
Standard wide mouth, so most third-party lids and handles fit.
Today's Amazon priceAmazon page
Best insulated for most people. Full review
| Bottle | Size | Height / base | Empty weight | Price | Buy |
|---|---|---|---|---|---|
| Owala FreeSip | 24 oz | 10.68 / 3.24 in | 14.1 oz | Check price | Buy |
| Hydro Flask Wide Mouth | 32 oz | 10.25 / 3.5 in | 18.4 oz | Check price | Buy |
Listing data, 10/26 to 10/28/2026.
What to know
Small fixes for big complaints
Most bottle complaints are lid and cleaning problems. A brush set and a spare lid fix both for under $20, which is less than any bottle on our list.
A starter kit for about $26
If you buy only three things, make them the brush set and the spare straw lid, plus a pack of cleaning tablets. Together they cost about $26, and between the brushes for the channels, the second lid for drying and the tablets for smell, they take care of most of the reasons people give up on a perfectly good bottle. Start there.
Fit first
Check base width, mouth width and brand before you order. The third-party straw lid we track names Hydro Flask and Takeya wide mouths, and the paracord handle is sized for Iron Flask wide mouths. A part that almost fits is the one that leaks.
Buy by problem
Mold calls for brushes, tablets and a spare lid. Noise and dents call for a boot. The car calls for an expander, warm water for ice sticks, and lost bottles for name labels.
Two prices we hide
The Owala boot and the Iron Flask handle showed prices with no decimal point. Rather than guess, we show no price for them. Check the listing for today's number.
What to skip
Skip any accessory with no listed size range, and skip universal lids that do not name the bottles they fit.
The accessories, one by one
Start with these three
Bottle and straw brush set
The set we track is a lab-style kit: four straw brushes from 7.9 to 12.5 in, a 14 in bottle brush, a 16 in long brush and a 4.3 in spout brush. Between them they reach every straw and spout on our list.
Fit check: Make sure the set includes a straw brush.
Today's Amazon price
Spare straw lid for a Hydro Flask
This third-party flip straw lid lists fits for wide mouth bottles from 16 to 64 oz and names Hydro Flask and Takeya. Its listing says top-rack dishwasher safe. Two lids in rotation means one is always dry, the cheapest defense against mold.
Fit check: Match the mouth width and brand.
Today's Amazon price
Bottle cleaning tablets
Bottle Bright tablets fizz in warm water and lift coffee and tea stains. The listing says they are free of bleach and chlorine and made in the USA, and one or two in a bowl will soak a pile of lids and straws at once.
Fit check: Check the count per pack.
Today's Amazon priceWorth it for some bottles
Silicone bottle boot
The Owala silicone boot fits the 24 oz steel FreeSip only, with the Twist and Sway excluded. It quiets the bottle and protects the base. Its price showed with no decimal point, so we hide it.
Fit check: Match the boot to the bottle model and size.
Today's Amazon price
Paracord bottle handle
This paracord handle is made for Iron Flask wide mouth bottles, mainly the 40 and 64 oz sizes, and clamps around the neck with a plastic ring. Check your mouth width against it. Its price is hidden for the same decimal issue.
Fit check: Match the mouth size.
Today's Amazon price
Bottle sling bag
A crossbody sleeve sized 4 by 5 by 12 in for 32 to 40 oz bottles, with a phone pocket. It turns a heavy bottle into a hands-free one for walks and errands.
Fit check: Check the bottle size it takes.
Today's Amazon price
Waterproof name labels
A 136-label pack you write on and stick on, rated waterproof and dishwasher safe. The whole pack costs less than half of a new kids bottle.
Fit check: Pick dishwasher-safe ones.
Today's Amazon price
Car cup holder expander
The insert expands from 2.6 to 4 in to fit the car, and the top holds bottles from 2.7 to 4.2 in, listed as 16 to 46 oz. That range covers every base on our list, including the 3.76 in Stanley.
Fit check: Check the base range against your bottle.
Today's Amazon price
Ice stick trays
Two silicone trays, ten sticks each, about 9 cm long. The sticks slide through mouths too narrow for cubes, and the trays go in the dishwasher.
Fit check: Pick by mouth width.
Today's Amazon pricePairs well
Bottle drying rack
This is a baby bottle rack with 15 pegs, 11 by 6.2 by 13 in assembled. It earns a place here because pegs keep lids, straws and gaskets apart while they dry. Check the clearance before you hang a tall bottle on it.
Fit check: This listing is a baby bottle rack, so check that tall bottles fit.
Today's Amazon price
Kids insulated lunch box
A kids insulated lunch bag, 4.33 by 7.7 by 10.6 in, with room for an ice pack. It pairs with the Funtainer for a school setup.
Fit check: Look for an easy zipper.
Today's Amazon price
20 oz insulated tumbler
A 20 oz steel tumbler with a sliding lid, for the coffee a cold-only bottle cannot hold. The listing claims more than 6 hours hot and calls it lead free.
Fit check: A sealing lid helps.
Today's Amazon priceMore questions
Are spare lids worth it?
Yes. Two lids in rotation means one is always dry. The wide mouth straw lid we track costs about $9.
Do silicone boots fit every bottle?
Boots are sized per bottle. Match the maker and size; Owala's fits the 24 oz FreeSip only.
Which brush set do I need?
One with thin straw brushes in several lengths and a small spout brush.
Do cup holder expanders fit all cars?
Most. The one we track expands from 2.6 to 4 in at the bottom and holds 2.7 to 4.2 in bases.
Are bottle slings comfortable?
For walks and errands, yes. The one we track takes 32 to 40 oz bottles and has a phone pocket.
Are cleaning tablets safe?
Follow the pack directions. The Bottle Bright listing says they are free of bleach and chlorine.