I've mentioned before that I don't go a day without using a Hydro Flask, and I haven't for the last two years. While more pricey than similar options, the company makes some of the most reliable vacuum bottles on the market.
Today, Hydro Flask kicked off its 4th of July sale. The sale is sitewide and everything (except the new Unbound Series coolers and MyHydro products are 25% off. The discount is automatically applied at checkout and the deal runs through the end of July 4.