The Swig Party Cup is constructed with triple insulated stainless steel that will keep drinks cold for up to 12 hours and hot for 3. The easy slider lid is spill-resistant and easy to remove when cleaning. The cupholder friendly base includes a non-slip silicone bottom, making this cup extremely travel-friendly. The stackable design allows for easy stacking and storing with multiple cups. Perfect for holiday gifts, company picnics, work retreats and employee welcome kits.