Yeah they aren't exactly accurate, but I use it more to give me a rough idea of the temps inside my demi-johns.
https://www.amazon.co.uk/Aquarium-Thermometer-Temperature-Sticker-Digital/dp/B01EN4H31M/ref=sr_1_8 56p delivered on Amazon (I have prime, no idea on non-prime delivery price)
Used to use similar for home brew temperature readings can be a little off..
Not knocking this, but there are loads of these for the same price on eBay. I bought a few for my homebrew a few weeks ago from the link below. 99p for one, then discounts for every extra (2 for £1.69, 3 for £2.29, etc). Exactly the same item as the one you've listed. https://www.ebay.co.uk/itm/1X-2x-3x-TO-20x-LCD-STICK-ON-ADHESIVE-STRIP-THERMOMETER-FOR-AQUARIUM-FISH-TANK/292454248812?ssPageName=STRK:MEBIDX:IT&var=591309509333&_trksid=p2057872.m2749.l2649
Yes I got one around 3 months back also bought fish tank artificial plant set for 49p