Boots & Sleeves

A silicone boot is a small accessory that changes how a tumbler feels day to day. It slides over the base of the cup, softens the clunk when you set it down on a desk or a car console and adds grip on smooth, wet surfaces such as a gym bench or a boat deck.

Boots also help protect a powder-coated finish from scuffs when the cup rides in a cup holder or on concrete. They do not change the cup’s capacity, but they can make the base slightly wider, so check your cup holder if the fit is already tight. Each listing states the cup sizes or base diameters the boot is made for.

Sleeves cover more of the cup body and give a softer, warmer feel in the hand. If you hold a cold tumbler for long stretches, a sleeve can make it more comfortable to carry.

To clean a boot or sleeve, take it off the cup, wash it with warm soapy water, rinse and let both the boot and the cup dry fully before you put them back together, so no water is trapped underneath. Unsure which size to choose? Our size and fit guide shows where to measure a base. Accessories ship free to the US, Canada, Australia and New Zealand, see shipping details.