Brewing Thermometer Strip Adhesive Strip Thermometer Aquarium Thermometer Strip, Temperature Test Strip Thermometer Sticker for Fish Tank/Kombucha/Fermentation Jar 39 to 97℉/4 to 36℃ (10pcs)

I got a CulCan by Black Ice Cooling, $40, and I added a sticker thermometer used for home brewing to ensure I didn't try to hold it when it was too cold. I hesitated to recommend it specifically because you have to keep it cold until you want to use it, and when everyone around is curious and wants to try it, it warms up quickly. If you want to use it again, you have to have to freeze it again. However, a quick search showed that there are no other options at a reasonable price. https://www.amazon.com/Black-Ice-Cooling-Cooling-Activities/dp/B0C37ZJLG8/ https://www.amazon.com/gp/aw/d/B0BZRW6WWD