If I take beer or carbonated water outdoors in a thermos, won't the lid suddenly pop open?
When enjoying outdoor activities, you might want to bring cold beer or carbonated water, but you may hesitate out of concern that carbonation pressure will build up inside a sealed bottle and make the lid blow open.
Thermoses from DVERG feature a proprietary safety valve that releases internal pressure on its own, so you can safely carry beer or carbonated water.
What catches the eye even before the cold retention performance that lasts for 36 hours is how it handles carbonation[1][2]. It is safe. A proprietary safety valve mechanism is built in to automatically exhaust internal pressure raised by carbon dioxide gas inside the bottle[3]. Typically, putting carbonated drinks in an airtight thermos causes the internal pressure to expand, making contents likely to spray out when opening the lid, but because it relieves pressure on its own, you can carry beer or carbonated water with peace of mind[4].
Usability also flows directly into daily routines. Pressing the 3 buttons on the cap at the same time opens it, and pulling the ring at the top immediately locks it[5]. Without having to twist the lid open, you can open it with just finger operation and drink right away. Beer contained this way stays cold for up to 36 hours, and the warmth of hot drinks is preserved for up to 18 hours[6].
Whether the safety valve parts can be completely disassembled for washing and whether it is dishwasher-safe have not yet been confirmed.