On the diva cup topic, I normally go 12 hours without changing it the first two days, and 24 hours after that. I've even gone 36 a couple times when I've completely forgotten/have been camping. 36 hours, yeah, a little too much and gross. But I've never had a problem health-wise. I've been using a diva cup since I was 16.
The diva cup company recommendations are: maximum 10-12 hours, and buy a new one once a year (this is new, I swear it used to be 5 years!). I view those guidelines like I view expiration dates on food. To cover the company's asses and to encourage more consumption of their product. That being said, I meticulously boil mine before every usage and I never, ever insert or remove without washing my hands.
I'm on my second diva cup in 9-10 years. Again, no problems.
Anyway, even following those guidelines, 10-12 hours is more than enough to get you through a full day of work without changing it.
And yes alpha888, now that you've read about the silicon cup I insert in my vagina, the short version of my story is -- from ages 20-24 I increased my net worth by 50+k, with an income between $20-$30k a year -- 28k of it I paid off all my student loans. Now I have something like 10k saved, 13k in investments. Honestly I don't monitor my money that closely and I always have way more than I think, because I spend SO little.
I am 25 and I have been traveling for 10.5 months, 2500km by bicycle from Idaho to Washington then from Norway to Poland, after that some bus/hitchhiking/helpx nomadism in France, UK, and now in Georgia. I have spent less than $3k total mostly because I camped, couchsurfed, worked for free room and board, and knocked on people's doors to sleep in their gardens. I'm currently living in an apartment in Tbilisi spending less than $300 a month while still making some trips on the weekends and binge-working online ("binge-working" for me means 20-25 hours a week, I have to live after all) I have almost replenished all I've spent and it would be cool to max out my $5500 for IRA this year and cross $30k. I don't think I'll make it, but oh well. This summer I'll be doing another long bicycle tour (my bike is in France so France to somewhere else) and a long hitchhiking trip (Turkey to Poland). And then after that I dunno.
I know that I should be putting much more away for retirement but my heart of hearts wants to live life in this grand frugal majestic way and not work a job I hate supporting systems I hate for any amount of time. Especially because of all the problems in the world and the possibility that things can always change to be like they've ever been. Though I'm not going to be able to retire at 35 which was my goal when I first really started getting into MMM in 2013, my priorities have changed to spend my 20s chasing the things that make my heart sing, like public transport and bicycle planning/activism/education, literary translation, food waste, and kindness and empathy and communication among strangers across generation and identity. I'm young and maybe it makes me naive, but I really believe that those who put 100% of their energy into what they love tend to end up with everything falling into place. In any case, I'm prepared to give it a shot and accept the consequences. En fin, sorry to derail! :)