To be honest, I haven't thought about it. I mean, I buy usually the 6 or 8-pack of bar soap for myself. Hand soap I usually buy the big size refill of liquid soap. A tube of toothpaste lasts for ever, probably 6 months per tube.

When camping, I've gone a week without showering. You get a bit ripe, but only to a point before you're done with basting in your own filth and your body hits an equilibrium.

So for this mental excercise, assuming I bath once weekly, I'm sure my 8-pack would do just fine for a LONG while. Maybe 2 years? That's only 104 baths. I think it's do-able. I don't know if the toothpaste would last that long, but if a 2-pack lasts me a year, and I brush 2-3 times a day, then yeah, once a day should last 2 years.

As for laundry or hand soap, I think I'm ok just rinsing my chothes or bathing with them on during my weekly cleaning.

I advise others to stay upwind of me in this situation.