At the suggestion of friends, [VegOilGuy] decided it was time to invest in a vibration tumbler. Naturally, building it rather than buying it was the order of the day. If you’ve ever used an ...

Prepare to meet your match. Just like Owala’s bestsellers, the FreeSip Tumbler features a spout with a built-in straw that allows you to sip or swig at your leisure. Triple-layer insulation ...