A 600ml / 20 fl oz Borosilicate glass bottle with a protective non-slip sleeve, convenient carry loop and full glass and Stainless steel contact with water.Thread Is On The Inside Of Neck:- The thread is on the inside of the bottle so the outer lip is smooth and gives a better drinking experienceStainless Steel Lid:- It is strong, hard wearing, taste neutral, and it means that no plastic comes into contact with the waterNylon Paracord Carry Loop:- Strong, hard wearing, water and mildew resistant paracord make it easy to carry your bottleA Word From The Designer:- There is something lovely about drinking water from glass. It makes the water feel fresh, crisp and clean. We wanted to create a minimal bottle design that celebrated this. It was a challenge to hand blow a glass bottle with a thread on the inside, but working closely with the skilled artisan makers, we were able to achieve a spout design that was a pleasure to drink from. The stainless steel top and paracord loop give the design a utilitarian feel and the silicone sleeve provides reassuring grip and protection to offset the fragility of the glass. The end result is a pure, no nonsense design that will age well and can become your everyday bottle that you will enjoy using for a lifetime.Features:- Thread on inside of the bottle neck for smooth drinking- High quality Stainless steel lid- Paracord carry loop- BPA free- Can be used with our Active Charcoal Filter + Coil, giving you up to 6 months of clean, clear and delicious water per stick. Please do not use charcoal in this bottle without the coil - charcoal is an incredibly dense material and could cause the glass to crack if not secured in place.Specifications:- Glass, stainless steel, nylon, polypropylene and silicone.- 600 ml 20 floz- Weight: 340g/0.75Lbs- 100% leak proof