Review on 🌈 Greens Steel Rainbow 20oz Tumbler - Premium Stainless Steel Vacuum Insulated Coffee Ice Cup with Double Wall Travel Flask by Amanda Wohltmann

When I first received this jar, I really liked the way it looked. Keeps coffee hot etc. However, the sliding lid is so tight that it doesn't allow the proper flow of air into the vent needed to take a decent sip through the spout. The design is terrible! Also, you can't remove the sliding cover to clean underneath! All in all, I wish I could return it and get a Yeti, but I've already thrown out the packaging and started using a useless jar! Sorry for the negative review but aside from looking and feeling good the design needs some work! (UPDATE) I wanted to share how I solved the problem I was having. I ended up drilling a tiny hole in the top of the sliding lid, which now allows air to flow through the top and into the vent under the sliding lid, making for a proper sip! With the lid closed, it's still leak-proof! See attached photo of my repair. I hope this helps if anyone else has bought this jar or is considering buying one. If I could get the patent rights to this fix, this is how I would do it!