6+ months π«
I usually clean it once I can no longer ignore the pink scum and black mold growing in it π
this post was submitted on 18 Mar 2026
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β¦β¦ yup - came here to say βwhen I notice the black stuffβ.
I appreciate your honesty, and I'm not far behind. I'll scratch off build up sometimes and easily go months. Washing it is probably a similar frequency to getting my haircut.
Wash them???
Mold and bacteria can grow in it within a day or two, even if it's not visible. I hand wash mine once every week or two. I also sanitize it regularly by pouring boiling water in the tumbler (it's metal) when I make tea, then leaving the hot water in for about 10 minutes.
that's probably bad, huh?
What if I'm very regularly using it for tea?
I don't deep clean mine unless its needed
I usually just rinse it out and call it a day.
I wash the parts my mouth touches pretty regularly. The other bits, especially if the donβt get backwash? Maybe a few times a year the whole thing goes in the dishwasher. Disassembly and careful hand washing? Bitch, youβre a water bottle. You donβt get that!
Typically I rinse it out daily and bout 1/week actually scrub it with soap or put it in the dishwasher
Asking because the tumbler I use has a lot of little parts, so I easily go weeks between washing. I'm hoping someone more knowledgeable than me shares a good reason why I shouldn't do that, because I feel a bit self conscious about it, but not enough to frequently wash.
Itβs fine until itβs not, but you can do a lot to combat growth by rinsing it with vinegar and boiling water, then letting it fully dry before using it again once or twice a week
About 16 years and counting
Honestly I think its been years. There's some hard water on the lid, but no traces of mold or anything like that. It also tastes and smells normal to me.Β
I only get dishwasher safe coffee tumblers and I wash them daily. I have enough respiratory goo without adding mold to the mix.
If weβre talking for water drinking only? Rinse out each day. Wash every other day. If I put coffee in, full wash each day.
I use a metal thermos and I go 1 week then I soak with cafiza and boiling water for a few minutes
1 day, because I try to run the dishwasher every day anyway.
Not too long. Like once a week or every other week. What happens is I forget and leave water in it, and then Iβll wash it.
Every couple of days I will squirt some dish soap in there with water and give it a thorough shake. Every week or so I actually disassemble it for a proper clean.
I can go a few months. I drink one big one a day and leave the cap off overnight until I refill it in the morning. Leaving the cap off really helps keep the mold away
everyday.
After using it.
Drink
Rinse
Dry
Repeat
Prolly once a week.
Once a month. The tap water quality in Austria is excellent. I have a SIGG aluminium thermo bottle. Normally I leave it overnight with one Kukident tablet and some citric acid powder inside. Next day its ready for the whole month.
I clean mine whenever I start to see a visible crust/film form around the spout I drink from. It's just for water, so that's pretty much the only part that gets nasty.
After I use it each time??
I wash it whenever it's in my hand and I'm near a sink, so at least once a day when it's in active use.
The real question is how often do I dty it?