I've had them in glass, simmular as on the photo, still have it and one with 1 short and a 20cm long leg. The long one broke one day. The small glass one i still have.
What i didn't like with the short one, is the tube will turn white after a day submersed. Than its a nice clear glass diffuser and a clear U but a white tube in between looking silly awfull. There for i bought the long U.. Still it needs a short piece of tube to connect turning white sticking out as a sour thumb. Same as the clear suction cup on the diffuser.
I guess in the end the acrylic version will be a lot stronger and snap less easily than the glass version. In any way always put on or take off tube that first is softened in hot water. Don't jerk off a cold tube or it might snap. Only thing is acrylic can scratch and turn dull from cleaning, glass doesn't.
Mho, if you can't get around using tube submersed that turns awfully white and green. Than using clear glass or plastic to hide it doesn't work, there is always an uggly part atracting attention. Than why not simply go all the way nice design stainless steel. Or even beter an inline diffuser, these actualy still work the best. And these come also rather cheap as well, i've used the Mufan inline diffuser for a few years and i realy liked it.
www.aliexpress.com/item/Mufan-4-in-1-Multil-Functions-CO2-Diffuser-with-Bubble-Counter-Check-Vavle-Diffuser-For-Planted/32800716993.html
Is there another way of doing this (DIY)?
Can't think of anything looking good enough.. Other than diy bending acrylic tube can be done.. You need to fill it with dry to the bone fine sand. Absolutely no airpockets after its filled with sand. Tightly plug both ends, heat the tube till approximately 80°C (in hot water) and gently bend it. Dip it in cold water and it stays in bend shape.
Point of causion.. The tiniest air pocket in the sand it will shift during bending and cause a kink in the bending process. Thus it realy needs to be 100% filled with sand from plug to plug.