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.

6+ months 🫠

I usually clean it once I can no longer ignore the pink scum and black mold growing in it 🙊

I wash the parts my mouth touches pretty regularly. The other bits, especially if the don’t get backwash? Maybe a few times a year the whole thing goes in the dishwasher. Disassembly and careful hand washing? Bitch, you’re a water bottle. You don’t get that!

About 16 years and counting

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.

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. 

I only get dishwasher safe coffee tumblers and I wash them daily. I have enough respiratory goo without adding mold to the mix.

If we’re talking for water drinking only? Rinse out each day. Wash every other day. If I put coffee in, full wash each day.

I don't deep clean mine unless its needed

I usually just rinse it out and call it a day.

Typically I rinse it out daily and bout 1/week actually scrub it with soap or put it in the dishwasher

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.

Prolly once a week.

I use a metal thermos and I go 1 week then I soak with cafiza and boiling water for a few minutes

After using it.

Drink
Rinse
Dry
Repeat

1 day, because I try to run the dishwasher every day anyway.

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.

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?