I've had an RTIC tumbler that was a give-a-way from a Sika sealants lecture I attended about 4 years ago. It is far and away my favorite mug, keeps things hot or cold for hours and seals really well. You can buy them online for about a 1/4 of the Festool price.
I love my Festool's for their function and performance, for some things I don't see the value in paying for the branding. You are paying to do their advertising. I do wear my t-shirts that were gifts for buying the tools on job sites all the time and am always happy to talk about the brand, don't make me pay for it please.