Sudstainables Water Bottle Cleaning Tablets – 36-Pack, Chlorine-Free and Odorless Cleaner for Hydration Bladders, Stainless Steel, Tumblers, and Glass Bottles - Removes Stubborn Stains and Odors

I had 3 Blender Bottle Shaker cups and they got stained by my amino acids. Followed the instructions, no change at all with the stains (I scrubbed the inside afterwards too). Attempted again with 4 tablets in each shaker cup, let soak for 2 hours, rinsed and scrubbed once again. No changes at all... I gave a 5 star so people don't waste their time with this product, $10 isn't much but if youre trying to get rid of stains...Youre better off finding another wayBefore (1st) and After pics (2nd)

I had to use a few tablets but it did the job! I bought a scrub brush for leftover residue and here’s the result. This bottle was filthy and these tablets are the holy grail.

Really happy with the amount of tablets you get in this pack. Actually has a pretty nice smell, nothing overpowering or chemical. Does a good job of cleaning and doesnt leave any residue

These cleaning tablets are semi effective. They get most of the stain out, but not entirely. I use them to clean my yeti bottle that I use for hot tea and typically use a tablet to remove stains every few weeks (yes, I do wash in between). A previous cleaning tablet that is no longer available would clean with one tablet. It takes at least two of these tablets to get the bottle clean any inside to its original color.

Quick, easy to use and it refreshed my 64oz bottle in just a little over 15 minutes. With the small mouth opening to the bottle these tablets are a game changer.

Works great. On difficult cups and coffee pots I use hot water and 2 and leave over night for great success

These are so easy to use and do a great job! *One nudge- Follow instructions- fill with water before dropping in the tablet.

a bit expensive, so I tried dental cleaning tablets instead