Two warnings about bird tents / snugglies / huts:
1. These can be chewed and frayed, depending on the material. This has caused problems if they ingest it, and sadly birds have gotten caught up in the loose fibers / chewed strings before and have hanged themselves or lost toes. I have had peers tell me this sad story several times! It's depressing and totally preventable. If you buy one check it daily for damage and fraying!
2. Once a bird reaches maturity it can cause an unnatural, prolonged elevated level of hormones which in female birds can cause them to lay eggs, become moody, or even more aggressive. In males they may try to mate the toy, or regurgitate for it, and often become more aggressive. Watch your bird's behavior carefully. It can look cute to have them snuggled up but unnaturally elevating their hormones over a long period of time can be detrimental.
Best wishes!