The maximum running time of this slim ribbed hourglass is 90 minutes. Though it is higher than other 90 minutes hourglasses, the shape leads to its maximum running time can not be longer.
We can put a sticker in the middle of each end.
We put the slim ribbed hourglass into a PE bag, then wrapped it with polyfoam and put it into a white box. It is the regular safe packaging for most glass sand timers.
For other general information like the samples, shipping, payment terms, please check the FAQ page. There are great answers.
As a factory since 2002, we can have some cases for your reference and hope they can do some help.
(1) About the Hourglass Color
We can customize the glass colors. We are not just can only change the color of the sand.