I've been using a 0.5L one for years now. Usually it's enough, but there are times that when I dry (with toilet paper) I see that I need a little more cleaning and then I either finish with the paper or refill the bottle and try again.

Well, you can spend 300-400 or you can buy a "portable bidet bottle" and clean your asshole with warm water. You'll still need to use some toilet paper (or maybe a towel) to dry, but you'll be spending $15 more or less and you can carry it with you when you travel.

2.5 million copies sold in EA, but barely got a mention? ok...

I think the problem here is thinking that sex == romance.

There is also the pico that costs more or less the same iirc. Although it's not available worldwide and the company was bought by bytedance not long ago, so...