Yeti's Rambler 18 oz Bottle with Chug Cap is a lightweight and compact insulated bottle for quick trips. The double-wall vacuum insulation keeps your drink cold and the Chug Cap provides controlled gulps and the locking lid promises a secure, leak-proof closure. 18 oz (532 ml) Rambler Bottle Chug Cap with built in drinking spout Quick twist TripleHaul handle 100% leakproof when lid closed Keeps cold drinks & hot drinks hot Double wall vacuum insulated 18/8 stainless steel Fully dishwasher safe Puncture & rust resistant No sweat design prevents hand condensation Not intended to use with carbonated beverages.