General pricing for Lat Phrao area:
Top off: 1,300-1,600 Bahts
Full option: 1,800 to 2,200 Bahts
B2B: 2,100 to 2,300 Bahts
Fruity Spa, which is closest to Milk Spa, offers 2,099 Bahts (S-class) and 2,299 Bahts (M-class) for B2B.
Studio @ Town in Town in Wangthonglang has only two prices: 2,300 Bahts and 2,500 Bahts.
Services, prices and promotions offered by each shop will vary; thus call ahead (assuming the shop poot angrit nid noi dai

) to confirm availability and price.
Got my eyes on น้องอองฟองต์ (sister Enfant)of Fruity SPA