Review on 🌡️ Ultimate Insulated Food Jar: Hydro Flask's Leak Proof Cap Ensures Freshness by Michael Jackson

I recently bought my daughter a 10 ounce thermos funtainer with a collapsible spoon to take soup to school for lunch. It cost $16.99. It worked well but I love all my hydroflask water bottles so I was excited to try this. I tested them side by side this morning. I started by filling them with hot tap water to heat the metal interiors while I boiled the water. I drained the tap water, and then poured boiling water over both of them (the temperature was 210 degrees). I sealed them tightly and left them on the table for 4 hours. Then I measured the water temperature. The water temperature in the hydro bottle was 137 degrees and in the Funtainer thermos was 151 degrees. In fact, I could see a small amount of steam coming out of the thermos and I couldn't see anything from the hydro flask. At first glance, the HydroFlask appears to be more solid (it weighs 13 ounces and the thermos weighs 9 ounces), but the lid of the thermos is bulkier, which is why I think the thermos retains heat better. Put a lid on both so that small children can use them easily. But when it comes to heat retention and price, the thermos wins.