SodaStream Bottle Caps and Stainless Bottle Care Guide

By SodaStream Official: Sparkling Water Makers, Carbonating ... | Published: 2026-10-13

Category: Tips & Care

A step-by-step routine for cleaning SodaStream carbonating bottles, swapping bottle caps, and keeping fizz in the fridge. Includes cap twin pack picks and a dishwasher check.

Quick answer

Rinse your carbonating bottle with warm water after every use, wash it thoroughly once a week, and check the cap seal at the same time. Replace worn caps with a twin pack so a spare is always ready, and store filled bottles capped in the fridge to hold carbonation. Never put the bottle in the dishwasher unless the catalog listing explicitly says it is dishwasher safe.

Why the cap matters as much as the bottle

Carbonation escapes through the weakest point in the system, and on a SodaStream bottle that point is usually the cap seal. A cap that no longer seats tightly lets fizz fade within hours, even if the bottle itself is fine. SodaStream sells caps in twin packs for exactly this reason: one cap is in use while the other is clean and ready, so you are never caught with a flat bottle and no replacement.

Cap style also changes how you carry the bottle. Flat caps seal for fridge storage, while loop caps add a carrying loop for transport. Matching the cap to the moment is a small habit that prevents spills and lost carbonation.

How often to clean and when to replace

A quick warm-water rinse after each pour removes most residue and takes seconds. A deeper wash once a week handles the film that builds up from repeated use, especially if you carbonate water that already contains minerals or if you add flavor after carbonating. Always fizz water before adding any flavor, as SodaStream instructs, because adding flavor first can cause foaming and residue that is harder to rinse out.

Caps do not last forever. If a cap feels loose, shows a cracked or flattened seal, or lets carbonation drop noticeably overnight, replace it rather than tightening harder. Keeping a twin pack on hand turns replacement into a one-minute task instead of a reason to skip sparkling water for a few days.

Storage habits that protect carbonation

Cold water holds carbonation better than warm water, so refrigerate filled bottles rather than leaving them on the counter. Keep the bottle capped and upright, and avoid opening it just to check the fizz; every open releases gas. If you carbonated a full liter and will not finish it in one sitting, the cap is doing the real work, which is why a clean, well-seated cap is worth the small cost of a twin pack.

Step-by-step bottle and cap care

Rinse immediately after pouring: Fill the bottle about one-third with warm water, cap it, shake gently, and pour out. This removes most residue before it dries. Checkpoint: if the water smells stale or cloudy, move straight to a full wash instead of a rinse.
Wash weekly with warm water and mild soap: Use a soft bottle brush and warm, soapy water. Rinse thoroughly so no soap film remains, since residue can affect taste and carbonation. Common mistake: using hot water or abrasive scrubbers, which can stress the bottle and cap materials.
Check the dishwasher label before loading: Only put a carbonating bottle in the dishwasher if its listing says it is dishwasher safe, as the ENSO Stainless Steel Sparkling Water Bottle 33.8 oz does. Remove the base first if it is removable. Checkpoint: if the listing does not state dishwasher safe, hand wash only.
Inspect and swap the cap: Look at the cap seal for cracks, flattening, or looseness. If it looks worn, replace it with a cap from a twin pack such as the Stainless Steel Bottle Caps Twin Pack or Loop Bottle Caps Twin Pack Black. Common mistake: over-tightening a worn cap instead of replacing it, which does not restore the seal.
Dry and store capped: Let the bottle air dry fully before capping for storage. For filled bottles, cap tightly and refrigerate upright. Checkpoint: if carbonation fades within a day, the cap is the first thing to replace.

Products that support this routine

Sodastream Stainless Steel Bottle Caps Twin Pack: Stainless Steel Bottle Caps Twin Pack creates a hermetic seal with SodaStream carbonating bottles, and the catalog notes sparkling water can stay carbonated for up to 2 weeks in the fridge if left unopened. A sealed cap is what preserves fizz during storage, so a spare cap means you can replace a worn one immediately instead of losing a batch.
Sodastream ENSO® Stainless Steel Sparkling Water Bottle 33.8 oz: ENSO Stainless Steel Sparkling Water Bottle 33.8 oz is a 1-liter carbonating bottle with a removable base and is dishwasher safe, with all parts BPA-free. Because this specific bottle is listed as dishwasher safe, it can go in the dishwasher; other carbonating bottles may not be, so check each bottle before washing.
Sodastream Loop Bottle Caps Twin Pack Black: Loop Bottle Caps Twin Pack Black adds a carrying loop for taking sparkling water on the go and comes as a set with an extra cap. If you carry a bottle in a bag or to work, a loop cap is easier to hold and keeps a spare available for home storage.