I have to add something about acclimatization.
Again I didn't drip acclimate my new shrimps. They were delivered on Thursday, but I came home on Friday, so one day in the bag standing on my desk. The temperature was right, so when I came home I just poured them into a bowl, took them out with a net and tossed into the tank. So far not a single shrimp was lost (it's Sunday). The thing with not doing drip is your water parameters need to be more or less close to the params of water they came in (I have to admit I never checked...). Difference like NO3 of 5 in your water and NO3 of 30 in their (or other way around) may kill them, but if it's not something so extreme they won't go into shock. We have to make sure they won't get shocked only. Drip won't make their osmotic balance right in those few hours. They need days or weeks to get the balance right (for example with molting and changing the hardness of their shells), few hours of drip won't help with that. First time getting shrimp I did drip and lost some of them, after that I've got new shrimps 4 times (golden tigers, bloody mary, some culls, blue velvets) and never lost a single one in first weeks. No dripping ;-)