$42.99 – 2 Layer 300W Portable Electric Lunch Box (Banggood, Aliexpress: 2 Layer 300W Portable Electric Lunch Box Food Warmer for Travel Self Cooking Heated Lunch Box for Home Office Cooking Food – Green (the best price with coupon)).
2 Layer 300W Portable Electric Lunch Box is for $42.99 (in Banggood). Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood ($42.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it expensive? Hmmm, price is higher than average (which is $40.66 right now), so better set price alert down below…
Link: Banggood product page
Price: $42.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BG9c40c7
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 2 Layer 300W Portable Electric Lunch Box is here. The lowest price was: $38.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).