Huge 40 oz capacity! Part of Victoria’s Secret “extreme” sports line of clothing and accessories. Intended for use with cold liquids only, hand wash only, and please do not freeze or microwave. So, if you’re looking for something simple that will certainly keep you hydrated, this is it! I would also not count on this being entirely 100% leakproof due to its size although it certainly is spill proof. Item is brand new and unused.