Grunwerg Drinkpod Vacuum Insulated Leak Proof Capsule Flask, Stainless Steel, Mirrored Finish, 300ml

This flask is FANTASTIC. It does state that it is for drinks, but I needed something to take soup in that would keep it hot. After trying 7 different tyoes of flask, all promising to keep soup/drinks hot for at least 8 hours, and all of them faling miserably, I finally hit the jackpot with this one.I only need it to stay hot for 4 hours at the most. This little flask keeps my soup piping hot! I will be purchasing another one in the future.

Reviewing the 300 ml version:Size & shape:The flask larger than you'd expect for something that holds a mug-sized amount of liquid. Its tall shape and slightly un-level base makes it really wobbly; especially when empty. As it's slimmer than a typical water bottle it's a loose fit in backpack water bottle pocket.Leak-proof?Around the neck of the flask is a plastic seal which doesn't fit properly and falls out as soon as you pour its contents. Oddly it still appears to be water-tight when closed with this removed. The screw thread seems a little iffy though and I've noticed the lid can pop-off sometimes.Insulating:Seems to keep things warm fine.1 month later:I'm looking for something else as I no longer trust the lid to stay on.

Unfortunately due to Covid-19, this flask is currently out of action. However the times I have used it, it was great. Kept a (standard) mug of coffee at a good drinking temperature about 5 hours after I had made it. Haven't had any issues with it leaking, I commute so this is a biggie for me. To be fair, it is kept upright in a satchel style backpack and its held in place by all the other things in the bag but I did test if it leaks by turning it upside down (it didn't). Really compact and slim as well.

I like the vacuum flask in 300ml, just good size that fit my needs. It does kept warm for 4-6 hours, a little tips here, pour the boiled water to the vacuum flask first for 5 -7mins, rinse it then fill your drink. This is the way keep the drink warmer in longer time.Despite that, after several uses, the lid separated from the cover. I’ve contacted Amazon, they offered me a replacement immediately and I sent the current defective one back to Amazon.Hopefully the new one will last longer.

I use this for my coffee, I put boiling water in first just so my coffee isn’t going into aa cold flask. I make my coffee up in the morning and it is still boiling hot after 5 hours later when I have it. Would recommend, it holds one cup of coffee