shot glasses, automatic water activated colorful flashing led light up flash blinking beer wine whisky vodka martini drinkware glow glasses mugs for bar club christmas party supplies - 2 pcs didadi <b>didadi pineapple glow glass should be a hit at a party or anytime you want to spice things up a bit. in a lighted room, it will draw attention, but in dim light, it's a real eye-catcher, especially in the multicolor mode.</b><br><br> <b>glow glass information: </b><br> - material: durable sturdy acrylic plastic<br> - weight: 0.12kg<br> - capacity: 7 oz<br> - security: food safety<br> - size: height (8.5cm) /opening diameter(7.3cm) <br> - color: 7 flashing colors<br> - power by: 2*2025 cell batteries (included) (can be changed) <br> - occasion: party, bar, club, birthday party, home gathering, christmas decoration, holiday, disco, ktv, home<br> - available liquid: water, beer, wine, whisky, vodka, martini, drinkware, coffee, tea, etc<br><br> <b>pineapple cup description: </b><br> - it glows automatically when drinks are added it turns off when there is no liquid left. <br> - you can pen the battery compartment door located on the bottom of the base by sharp-pointed tools. these led cups include batteries, so you had better not put them into the dishwasher. <br> - the attention-getting part is the multicolor led light in the bottom of the glass. <br> - just press through the bottom and will start blinking. but do not clean them with the bottom on and battery bc will get ruined. <br> - this cup is environmental protection transparent shine cup, when pour into liquid (water, beverage, beer, etc),it will light up and flash immediately, very magical, suitable for celebrate, party, bars, gifts and so on<br><br> <b>how to replace batteries: </b><br> - unscrew the battery compartment door located on the bottom of the base. <br> - place new batteries in the battery compartment and screw on the battery door. <br>