... with suction cupplastic sand timerglass sand timer3min glass timercustomer made logo.print colorsMOQ: 200 piecematerial: glass,plastic,sandmanufacture: 3-7 daysfeature: ... 1. It has two connected vertical glass bulbs allowing a regulated trickle of material from the top ... sand, the bulb size, the neck width, and the sand quality.accept:1. print logo on both ends2. Product logo can ...