Reliable and Serviceable: the silver single walled stainless steel bottles set is made of quality 304 stainless steel material, which is sturdy and firm to use and drink, allowing you to enjoy the outdoors with peace of mind; The single wall stainless steel water bottle has no insulation function, and please be careful when heating water Leak Proof Design: the stainless steel water bottles are designed with insulated stainless steel cap, which are leak proof and have heavy thread, to keep water away from spills and messes and keep your drink odorless and unwanted taste Convenient to Use: the single walled stainless steel water bottle has a suitable bottle mouth, so you can add ice cubes or fruit to your water and drinks; Each water bottle comes with a hook for easy hanging and carrying Keep Fresh and Safe: the large stainless steel water bottles are highly rust resistant and won't retain any unwanted flavor, corrosion and oxidation resistance, ideal for hiking, motoring, camp