Glow in the Dark: Unlike normal sublimation blanks tumbler, ShineMe sublimation tumblers can glow in the dark. Just need to charge the glow with sunlight or bright light, the tumblers will turn to luminous green light at dark to add more fun at parties. The more light it absorbs in the day time, the longer time it will glow in the dark. 20oz Skinny Tumblers: 20oz=600ml capacity means the sublimation tumbler can hold a good amount of coffee or other beverage, and the straight skinny design makes it easier to hold. It’s also a good choice to choose our sublimation cups as travel coffee tumbler, since the lid is spill proof and the cups can fit in your car cup holder without any issue. Quality Sublimation Coating: After sublimation, the pattern and color is bright and vibrant on our personalized tumbler, all edges are crisp no “ghosting” or fading. And the surface is quite smooth not rough. Insulated Stainless Steel Tumbler: Insulated stainless steel material ensures the cups will keep your beverage hot at least 5 hours and cold for 12 hours. And it’s BPA-free and food grade material, rust-proof and sweat-proof. Decent Valentines' Day Gifts: You can DIY the pattern on our quality tumblers to suprise him or her when they received the gift, like no one will refuse the gift that only designed for him or her. Sublimation Tumblers Come with Extras: Every package includes: 4 pack blank sublimation tumblers; 4 pack leak proof sliding lids; 10 pack sublimation shrink wrap; 1 pack heat tape. ShineMe Glow in the Dark Sublimation Tumblers, 20oz Sublimation Cups with Spill Proof Lids and Sublimation Shrink Wrap, Valentines' Day Gift Stainless Steel Insulated Tumblers for Sublimation 4pack