How did you teach LO to get something out of it? Please tell me which one you use if it's spill proof. What age was LO when they started using it?

M/C #1 - BFP 12/28/2008. Confirmed m/c at 6wks - blighted ovum on 1/9/2009.
M/C #2 - BFP 6/16/2009. Confirmed m/c at 7wks - blighted ovum on 7/1/2009.
Re: For those using straw sippies
She only wanted to chew on the straw for the longest time. A few days ago we were out and I left her sippy at home. We got a juice box (I know, it's not good for her, but we were desperate) and I just squeezed a little of the juice into her mouth. Once she realized that drink came through the straw she started sucking and that was it.
We went out and bought a straw sippy the next day and she loves drinking water/milk out of it. We use playtex sippy cups:
https://myrealreview.ca/wp-content/uploads/2011/03/Playtex-Straw-Sippy-Cup.png
Evelyn (3.24.10), Graham (5.30.13) & Miles (8.28.16)
Bar tab = $156,000, Bus to Foxwoods = $0, Puking in the Stanley Cup = Priceless
I use the same one as homebird, DD loves it. She just caught on one day. Those playtex ones squirt a little liquid out when you squeeze it, so you can show them what is inside and give them incentive to try.
FWIW, I tried about 10 different sippys without straws before one day she just started using a straw at a restaurant. Once she did that, I went out and bought a bunch of those (we had one but she had never used it correctly).
We use this one: https://www.bfkidsonline.com/new-nuby-8oz-sippy-cup-flip-top-straw-gripper-w-handl.html
DS seems to really like it and actually gets stuff out of it. It doesn't leak anymore than any of the other cups we have tried. I do like the straw cups better than the other sippy cups because you can close the straw up in it, it keeps the part clean that goes in childs mouth.
The way we taught him to drink out of a cup was we went to a restaurant and let him practice drinking out of a straw in a cup. He got it immediatel and now drinks from his sippy straw cup. He started this at about 7 months.
This except DS was 7 months old. He uses the Nuby ones too. I think sucking up liquid through a straw is easier to learn than using the sippy.
DD1 didn't learn until after a year. Eventually, with a lot of trial and error, she picked it up.
DD2 has been using straw sippies for a couple of months, because she watched her big sister using them and started stealing them.
We use the Munchkin flip-top sippies with the silicon straws.
DD1, 1/5/2008 ~~~ DD2, 3/17/2010