Aliexpress
Click here… to search for Portable Folding Large Adult PVC Bathtub [EU] on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. Uhm… There’s no price history (in my database) for this product right now.
Link: Banggood product page
Coupon (55.19 USD): BG8OFFCOUPON
Coupon (55.19 USD): TTBLACK5
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG572958, BGFT324, BG5a3923, BG9a103c, Cuponation9, BG4581eb, BG8ReviTrage, BGcoupon8off
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Not enough data to show price history chart… 43.99 USD is the only recorded price. It was not cheaper than that since we have saved it in DB.
You can set price alert (for Banggood).