SIGG Gemstone IBT 500ml Thermos

A super lightweight thermos (290 grams )that delivers real world performance in a slim profile bottle filled with boiling water and put inside my fridge for 12 hours at +4 C the water was 64.9C

[paulconnor]

Hi Mike, great reviews mate, great detail and scientific approach, keep posing, thanks

[travelvideos]

good review! I am hesitant about the cup. Just adds to the weight.

[timvanseters]

Would you recommend the gemstone over the old version? The price for the new one is about 10 euros higher in my region, but the old one includes the cup on the bottom

[BP-bomm]

I don't understand your problem with cup...