Apparently this 1,000 year old brush rinsing pot is expected to sell for over 13 million US dollars!

Ru rinsing pot, Northern Song dynasty
Apparently the last similar pot sold at Sotheby’s in 2012 went for $22 million…!
For those on a more modest budget, Inkston has some newer designer ceramic rinsing pots etc here: https://www.inkston.com/shops/accessories/water-reservoir/