YETI ® Rambler® 8 oz Insulated Food Jar

Love this product for on the go to work. I make my overnight oats in it and the next day it's absolutely amazing I travel almost 2 hours a day to work. By the time I get to work my overnight oats are exactly as I took them out out of the fridge.

I purchased three Yeti Rambler insulated food jars (one 473ml and two 236ml) expecting reliable temperature retention, but all three failed to deliver. Hot Food Test: I placed freshly air-fried chicken breast (piping hot at 4am) into the 473ml jar. By noon (8 hours later), the chicken was completely cold. I even tried preheating the jar by filling it with boiling water and letting it sit for an hour before adding the hot food - same disappointing result. Cold Food Test: I pre-chilled the 236ml jar in the freezer for several hours before adding yogurt and oats at 4:30am. By 10am (just 5.5 hours later), the contents were already lukewarm.

Exercise in frustration. Cannot release the magnet and probably cannot return now that I've tried heat, cold and every other suggestion from Yeti and on line public support groups dedicated to addressing this terrible design. IMO, when it comes to Yeti, stick to the simple stuff, not over engineered containers with obvious design flaws. If you're going to include a strong magnet, at least make the screw top such that it can release the magnet. Curious to see if Yeti will take it back.