The Boulder is Eco Vessel flagship bottle that enjoys wide popularity, especially with its updated slimmer body and sleek profile. You can fill this bottle with both cold and hot drinks and take it anywhere, since its secure top will keep your drink inside where it belongs.Read more
This bottle features our vacuum TriMax® triple insulation technology and has been tested to keep liquids cold for 36 hours and hot up to 8 hours. Its dual use leak proof top has a wide opening for easy filling and a small opening for easy drinking. A versatile vessel for anything, anytime, anyplace and now available with interchangeable tops!
TriMax Triple Insulation Technology
Eco Vessel's vacuum TriMax triple insulation technology has been tested to keep liquids cold for 36 hours and hot up to 8 hours.