L&aacute;ska Neoprene Sleeve for 400ml/13.53 Fl Oz Eco-friendly Durable Double Walled Glass Tea Tumbler with Stainless Steel Strainer (Black, Medium (400ML/13.53 Fl Oz)) PROTECT YOUR GLASS FLASK. This Cozy Sleeve Made Of A Soft Stretchy Neoprene Blend Material. The Sleeve Will Cover Up To 90% Of The Tumbler. Gives Additional Protection To Your Tumbler And Help To Keep Your Hot Drink Warmer For Longer While You're On The Go. EASY TO USE. Just slide in the bottle and sleeve. Sleeve is removable for easy washing when needed. ELEGANT DESIGN. Your Neoprene Sleeve is Sleek in Design to Match Your Elegant Glass Flask. COVERS 90% OF FLASK. This Stylish Design Covers 90% of Your Glass Flask for Maximum Protection EASY TO CARRY BOTTLE. Your Neoprene Sleeve will Make it Easy to Carry Your Double Walled Glass Flask.